diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..62a150f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,18 @@
+.gradle/
+build/
+!gradle/wrapper/gradle-wrapper.jar
+.idea/
+
+docker/*.jar
+
+docker/output/*
+!docker/output/.keep
+
+docker/reports/*
+!docker/reports/.keep
+
+input-data/*
+!input-data/.keep
+
+*.log
+logs/
diff --git a/0.csv b/0.csv
deleted file mode 100644
index 2f7dfb7..0000000
--- a/0.csv
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:eae61feac01cb36de9d6dd148a5b3fb76ad506fd8b283b20306df16f246e511e
-size 3406784
diff --git a/1.csv b/1.csv
deleted file mode 100644
index 3a258b0..0000000
--- a/1.csv
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7b2681409003d07d3ca063eb34339a0cdea9b688d16723b0e284091afd6bf806
-size 7078520
diff --git a/2.csv b/2.csv
deleted file mode 100644
index 4cdd100..0000000
--- a/2.csv
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ea9a50aa300dfe7e766eb419b2a963d31cfe68644acb23f654df7abe852d3a76
-size 10737171
diff --git a/3.csv b/3.csv
deleted file mode 100644
index afbe78d..0000000
--- a/3.csv
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:6268fae7b50879a151a6f6de4852e4f39d2e22a8315290e87dcda71f4e10b866
-size 14530705
diff --git a/4.csv b/4.csv
deleted file mode 100644
index 9ff08df..0000000
--- a/4.csv
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:b4adf0d42097f1b2c9e68731460c5a7c52cb7ac7238addab7a796817cee9d00b
-size 18299520
diff --git a/5.csv b/5.csv
deleted file mode 100644
index 3980291..0000000
--- a/5.csv
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:212b6d6b07197921eaedaa271d781431b8bb034c5328622d63231a2967df1702
-size 22053240
diff --git a/6.csv b/6.csv
deleted file mode 100644
index 5906dc6..0000000
--- a/6.csv
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:81f65085c6ce29a8f766244dc4b21d41d565ea3d6231b3b1c0b6739d67cd1d53
-size 25790880
diff --git a/7.csv b/7.csv
deleted file mode 100644
index df43af3..0000000
--- a/7.csv
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:4e73ff71a37438ec216fc522d77e3902c5670e24a917d0be047ed101dbeea914
-size 29524261
diff --git a/README.md b/README.md
index 948dc85..84b20f4 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
+[![Review Assignment Due Date](https://classroom.github.com/assets/deadline-readme-button-22041afd0340ce965d47ae6ef1cefeee28c7c493a6346c4f15d667ab976d596c.svg)](https://classroom.github.com/a/uyodabcP)
 ## Лабораторная работа: Реализация MapReduce для анализа данных о продажах с ипользованием HADOOP!!!
 # Цель работы
 
diff --git a/build.gradle.kts b/build.gradle.kts
new file mode 100644
index 0000000..c7e7e51
--- /dev/null
+++ b/build.gradle.kts
@@ -0,0 +1,42 @@
+plugins {
+    java
+}
+
+group = "com.vitaya.para"
+version = "1.0-SNAPSHOT"
+
+repositories {
+    mavenCentral()
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+}
+
+dependencies {
+    compileOnly("org.apache.hadoop:hadoop-client:3.2.1")
+    compileOnly("org.apache.hadoop:hadoop-common:3.2.1")
+    compileOnly("org.apache.hadoop:hadoop-mapreduce-client-core:3.2.1")
+}
+
+tasks.jar {
+    manifest {
+        attributes(
+            "Main-Class" to "com.vitaya.para.sales.SalesDriver"
+        )
+    }
+    archiveBaseName.set("sales-analytics")
+
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+}
+
+tasks.register<Copy>("copyJarToDocker") {
+    dependsOn(tasks.jar)
+    from(tasks.jar.get().archiveFile)
+    into("docker")
+}
+
+tasks.build {
+    dependsOn("copyJarToDocker")
+}
diff --git a/docker/Dockerfile.build b/docker/Dockerfile.build
new file mode 100644
index 0000000..0abbf61
--- /dev/null
+++ b/docker/Dockerfile.build
@@ -0,0 +1,15 @@
+FROM gradle:7.6-jdk8
+
+WORKDIR /app
+
+# Copy gradle files first for caching
+COPY build.gradle.kts settings.gradle.kts ./
+
+# Copy source code
+COPY src ./src
+
+# Build the JAR
+RUN ./gradlew clean build --no-daemon
+RUN gradle clean build --no-daemon
+
+# The JAR will be in /app/build/libs/
diff --git a/docker/build.sh b/docker/build.sh
new file mode 100644
index 0000000..65d3704
--- /dev/null
+++ b/docker/build.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# Build the sales-analytics JAR using Docker (Java 8 environment)
+# This script builds the project in a container and copies the JAR to the docker directory
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
+
+echo "=== Building Sales Analytics JAR ==="
+echo "Project directory: $PROJECT_DIR"
+
+# Build in Docker container
+docker build -t sales-analytics-builder -f "$SCRIPT_DIR/Dockerfile.build" "$PROJECT_DIR"
+
+# Extract the JAR from the container
+CONTAINER_ID=$(docker create sales-analytics-builder)
+docker cp "$CONTAINER_ID:/app/build/libs/sales-analytics-1.0-SNAPSHOT.jar" "$SCRIPT_DIR/"
+docker rm "$CONTAINER_ID"
+
+echo ""
+echo "=== Build complete ==="
+echo "JAR file: $SCRIPT_DIR/sales-analytics-1.0-SNAPSHOT.jar"
diff --git a/docker/compose.yaml b/docker/compose.yaml
new file mode 100644
index 0000000..0528a8a
--- /dev/null
+++ b/docker/compose.yaml
@@ -0,0 +1,98 @@
+services:
+  namenode:
+    image: bde2020/hadoop-namenode:2.0.0-hadoop3.2.1-java8
+    container_name: namenode
+    hostname: namenode
+    ports:
+      - "9870:9870"
+      - "9000:9000"
+    environment:
+      - CLUSTER_NAME=sales-analytics
+    env_file:
+      - ./hadoop.env
+    volumes:
+      - namenode_data:/hadoop/dfs/name
+    networks:
+      - hadoop
+
+  datanode:
+    image: bde2020/hadoop-datanode:2.0.0-hadoop3.2.1-java8
+    container_name: datanode
+    hostname: datanode
+    environment:
+      - SERVICE_PRECONDITION=namenode:9870
+    env_file:
+      - ./hadoop.env
+    volumes:
+      - datanode_data:/hadoop/dfs/data
+    networks:
+      - hadoop
+    depends_on:
+      - namenode
+
+  resourcemanager:
+    image: bde2020/hadoop-resourcemanager:2.0.0-hadoop3.2.1-java8
+    container_name: resourcemanager
+    hostname: resourcemanager
+    ports:
+      - "8088:8088"
+    environment:
+      - SERVICE_PRECONDITION=namenode:9000 namenode:9870 datanode:9864
+    env_file:
+      - ./hadoop.env
+    volumes:
+      - ./sales-analytics-1.0-SNAPSHOT.jar:/opt/hadoop/jobs/sales-analytics-1.0-SNAPSHOT.jar:ro
+      - ../input-data:/opt/hadoop/input:ro
+      - ./reports:/opt/hadoop/reports
+      - ./output:/opt/hadoop/output
+      - ./run-job.sh:/opt/hadoop/run-job.sh:ro
+    networks:
+      - hadoop
+    depends_on:
+      - namenode
+      - datanode
+
+  nodemanager:
+    image: bde2020/hadoop-nodemanager:2.0.0-hadoop3.2.1-java8
+    container_name: nodemanager
+    hostname: nodemanager
+    ports:
+      - "8042:8042"
+    environment:
+      - SERVICE_PRECONDITION=namenode:9000 namenode:9870 datanode:9864 resourcemanager:8088
+    env_file:
+      - ./hadoop.env
+    networks:
+      - hadoop
+    depends_on:
+      - namenode
+      - datanode
+      - resourcemanager
+
+  historyserver:
+    image: bde2020/hadoop-historyserver:2.0.0-hadoop3.2.1-java8
+    container_name: historyserver
+    hostname: historyserver
+    ports:
+      - "8188:8188"
+    environment:
+      - SERVICE_PRECONDITION=namenode:9000 namenode:9870 datanode:9864 resourcemanager:8088
+    env_file:
+      - ./hadoop.env
+    volumes:
+      - historyserver_data:/hadoop/yarn/timeline
+    networks:
+      - hadoop
+    depends_on:
+      - namenode
+      - datanode
+      - resourcemanager
+
+volumes:
+  namenode_data:
+  datanode_data:
+  historyserver_data:
+
+networks:
+  hadoop:
+    driver: bridge
diff --git a/docker/hadoop.env b/docker/hadoop.env
new file mode 100644
index 0000000..253d34f
--- /dev/null
+++ b/docker/hadoop.env
@@ -0,0 +1,48 @@
+# Core configuration
+CORE_CONF_fs_defaultFS=hdfs://namenode:9000
+CORE_CONF_hadoop_http_staticuser_user=root
+CORE_CONF_hadoop_proxyuser_hue_hosts=*
+CORE_CONF_hadoop_proxyuser_hue_groups=*
+CORE_CONF_io_compression_codecs=org.apache.hadoop.io.compress.SnappyCodec
+
+# HDFS configuration
+HDFS_CONF_dfs_webhdfs_enabled=true
+HDFS_CONF_dfs_permissions_enabled=false
+HDFS_CONF_dfs_replication=1
+HDFS_CONF_dfs_namenode_datanode_registration_ip___hostname___check=false
+
+# YARN configuration
+YARN_CONF_yarn_log___aggregation___enable=true
+YARN_CONF_yarn_log_server_url=http://historyserver:8188/applicationhistory/logs/
+YARN_CONF_yarn_resourcemanager_recovery_enabled=true
+YARN_CONF_yarn_resourcemanager_store_class=org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore
+YARN_CONF_yarn_resourcemanager_scheduler_class=org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler
+YARN_CONF_yarn_scheduler_capacity_root_default_maximum___allocation___mb=8192
+YARN_CONF_yarn_scheduler_capacity_root_default_maximum___allocation___vcores=4
+YARN_CONF_yarn_resourcemanager_fs_state___store_uri=/rmstate
+YARN_CONF_yarn_resourcemanager_system___metrics___publisher_enabled=true
+YARN_CONF_yarn_resourcemanager_hostname=resourcemanager
+YARN_CONF_yarn_resourcemanager_address=resourcemanager:8032
+YARN_CONF_yarn_resourcemanager_scheduler_address=resourcemanager:8030
+YARN_CONF_yarn_resourcemanager_resource__tracker_address=resourcemanager:8031
+YARN_CONF_yarn_timeline___service_enabled=true
+YARN_CONF_yarn_timeline___service_generic___application___history_enabled=true
+YARN_CONF_yarn_timeline___service_hostname=historyserver
+YARN_CONF_mapreduce_map_output_compress=true
+YARN_CONF_mapred_map_output_compress_codec=org.apache.hadoop.io.compress.SnappyCodec
+YARN_CONF_yarn_nodemanager_resource_memory___mb=8192
+YARN_CONF_yarn_nodemanager_resource_cpu___vcores=4
+YARN_CONF_yarn_nodemanager_disk___health___checker_max___disk___utilization___per___disk___percentage=98.5
+YARN_CONF_yarn_nodemanager_remote___app___log___dir=/app-logs
+YARN_CONF_yarn_nodemanager_aux___services=mapreduce_shuffle
+
+# MapReduce configuration
+MAPRED_CONF_mapreduce_framework_name=yarn
+MAPRED_CONF_mapred_child_java_opts=-Xmx1536m
+MAPRED_CONF_mapreduce_map_memory_mb=2048
+MAPRED_CONF_mapreduce_reduce_memory_mb=2048
+MAPRED_CONF_mapreduce_map_java_opts=-Xmx1536m
+MAPRED_CONF_mapreduce_reduce_java_opts=-Xmx1536m
+MAPRED_CONF_yarn_app_mapreduce_am_env=HADOOP_MAPRED_HOME=/opt/hadoop-3.2.1/
+MAPRED_CONF_mapreduce_map_env=HADOOP_MAPRED_HOME=/opt/hadoop-3.2.1/
+MAPRED_CONF_mapreduce_reduce_env=HADOOP_MAPRED_HOME=/opt/hadoop-3.2.1/
diff --git a/docker/output/.keep b/docker/output/.keep
new file mode 100644
index 0000000..e69de29
diff --git a/docker/reports/.keep b/docker/reports/.keep
new file mode 100644
index 0000000..e69de29
diff --git a/docker/run-job.sh b/docker/run-job.sh
new file mode 100644
index 0000000..a265a12
--- /dev/null
+++ b/docker/run-job.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+
+# Sales Analytics MapReduce Job Runner
+
+set -e
+
+NUM_REDUCERS=${NUM_REDUCERS:-2}
+
+JAR_PATH="/opt/hadoop/jobs/sales-analytics-1.0-SNAPSHOT.jar"
+INPUT_LOCAL="/opt/hadoop/input"
+OUTPUT_LOCAL="/opt/hadoop/output"
+HDFS_INPUT="/input"
+HDFS_OUTPUT="/output"
+
+echo "=== Sales Analytics MapReduce Job ==="
+echo "Number of reducers: $NUM_REDUCERS"
+echo ""
+
+# Wait for HDFS to be ready
+echo "Waiting for HDFS..."
+until hdfs dfsadmin -safemode wait 2>/dev/null; do
+    sleep 5
+done
+echo "HDFS is ready."
+
+# Setup HDFS
+hdfs dfs -mkdir -p $HDFS_INPUT
+hdfs dfs -rm -r -f $HDFS_INPUT/* 2>/dev/null || true
+hdfs dfs -rm -r -f $HDFS_OUTPUT 2>/dev/null || true
+
+# Copy input data
+echo "Copying input data to HDFS..."
+hdfs dfs -put $INPUT_LOCAL/*.csv $HDFS_INPUT/
+
+# Run MapReduce job
+echo ""
+hadoop jar $JAR_PATH $HDFS_INPUT $HDFS_OUTPUT $NUM_REDUCERS
+
+# Get results and sort by revenue (descending)
+echo ""
+echo "=== Results ==="
+hdfs dfs -cat $HDFS_OUTPUT/part-* | tee $OUTPUT_LOCAL/results.txt
+
+echo ""
+echo "Results saved to: $OUTPUT_LOCAL/results.txt"
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..1b33c55
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..ca025c8
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100644
index 0000000..23d15a9
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,251 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH="\\\"\\\""
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..db3a6ac
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/input-data/.keep b/input-data/.keep
new file mode 100644
index 0000000..e69de29
diff --git a/run.txt b/run.txt
new file mode 100644
index 0000000..c320966
--- /dev/null
+++ b/run.txt
@@ -0,0 +1,9 @@
+cd docker
+./build.sh
+
+docker-compose up -d
+
+docker exec resourcemanager bash /opt/hadoop/run-job.sh
+
+cat docker/output/results.txt
+cat docker/reports/metrics.txt
\ No newline at end of file
diff --git a/settings.gradle.kts b/settings.gradle.kts
new file mode 100644
index 0000000..66e32db
--- /dev/null
+++ b/settings.gradle.kts
@@ -0,0 +1 @@
+rootProject.name = "lab3-vitaya-para"
diff --git a/src/main/java/com/vitaya/para/sales/DescendingDoubleComparator.java b/src/main/java/com/vitaya/para/sales/DescendingDoubleComparator.java
new file mode 100644
index 0000000..6209ab4
--- /dev/null
+++ b/src/main/java/com/vitaya/para/sales/DescendingDoubleComparator.java
@@ -0,0 +1,21 @@
+package com.vitaya.para.sales;
+
+import org.apache.hadoop.io.DoubleWritable;
+import org.apache.hadoop.io.WritableComparable;
+import org.apache.hadoop.io.WritableComparator;
+
+public class DescendingDoubleComparator extends WritableComparator {
+
+    public DescendingDoubleComparator() {
+        super(DoubleWritable.class, true);
+    }
+
+    @Override
+    @SuppressWarnings("rawtypes")
+    public int compare(WritableComparable a, WritableComparable b) {
+        DoubleWritable d1 = (DoubleWritable) a;
+        DoubleWritable d2 = (DoubleWritable) b;
+
+        return d2.compareTo(d1);
+    }
+}
diff --git a/src/main/java/com/vitaya/para/sales/SalesDriver.java b/src/main/java/com/vitaya/para/sales/SalesDriver.java
new file mode 100644
index 0000000..5ede4e5
--- /dev/null
+++ b/src/main/java/com/vitaya/para/sales/SalesDriver.java
@@ -0,0 +1,188 @@
+package com.vitaya.para.sales;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.conf.Configured;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.io.DoubleWritable;
+import org.apache.hadoop.io.NullWritable;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapreduce.Job;
+import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
+import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
+import org.apache.hadoop.util.Tool;
+import org.apache.hadoop.util.ToolRunner;
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.UUID;
+
+public class SalesDriver extends Configured implements Tool {
+
+    private static final String METRICS_FILE = "/opt/hadoop/reports/metrics.txt";
+    private static final int DEFAULT_NUM_REDUCERS = 2;
+
+    public static void main(String[] args) throws Exception {
+        int exitCode = ToolRunner.run(new Configuration(), new SalesDriver(), args);
+        System.exit(exitCode);
+    }
+
+    @Override
+    public int run(String[] args) throws Exception {
+        if (args.length < 2) {
+            System.err.println("Usage: SalesDriver <input> <output> [numReducers]");
+            return 1;
+        }
+
+        Path inputPath = new Path(args[0]);
+        Path outputPath = new Path(args[1]);
+        int numReducers = args.length > 2 ? Integer.parseInt(args[2]) : DEFAULT_NUM_REDUCERS;
+
+        Path tempPath = new Path("/tmp/sales_temp_" + UUID.randomUUID().toString());
+
+        Configuration conf = getConf();
+        FileSystem fs = FileSystem.get(conf);
+
+        // Delete output path if exists
+        if (fs.exists(outputPath)) {
+            fs.delete(outputPath, true);
+        }
+        if (fs.exists(tempPath)) {
+            fs.delete(tempPath, true);
+        }
+
+        System.out.println("=== Sales Analytics MapReduce ===");
+        System.out.println("Input: " + inputPath);
+        System.out.println("Output: " + outputPath);
+        System.out.println("Number of reducers: " + numReducers);
+        System.out.println();
+
+        long totalStartTime = System.currentTimeMillis();
+
+        System.out.println("Aggregation");
+        long job1StartTime = System.currentTimeMillis();
+
+        boolean job1Success = runAggregationJob(conf, inputPath, tempPath, numReducers);
+
+        long job1Time = System.currentTimeMillis() - job1StartTime;
+        System.out.println("Job 1 completed in " + job1Time + " ms");
+
+        if (!job1Success) {
+            System.err.println("Job 1 (Aggregation) failed!");
+            fs.delete(tempPath, true);
+            return 1;
+        }
+
+        System.out.println();
+        System.out.println("Sorting");
+        long job2StartTime = System.currentTimeMillis();
+
+        boolean job2Success = runSortingJob(conf, tempPath, outputPath);
+
+        long job2Time = System.currentTimeMillis() - job2StartTime;
+        System.out.println("Job 2 completed in " + job2Time + " ms");
+
+        fs.delete(tempPath, true);
+
+        if (!job2Success) {
+            System.err.println("Sorting failed!");
+            return 1;
+        }
+
+        long totalTime = System.currentTimeMillis() - totalStartTime;
+
+        System.out.println();
+        System.out.println("=== Performance Summary ===");
+        System.out.println("Aggregation: " + job1Time + " ms");
+        System.out.println("Sorting:     " + job2Time + " ms");
+        System.out.println("Total time:          " + totalTime + " ms");
+        System.out.println("Number of reducers:  " + numReducers);
+
+        writeMetrics(numReducers, job1Time, job2Time, totalTime);
+
+        return 0;
+    }
+
+    private boolean runAggregationJob(Configuration conf, Path inputPath, Path outputPath, int numReducers)
+            throws IOException, ClassNotFoundException, InterruptedException {
+
+        Job job = Job.getInstance(conf, "Sales Aggregation");
+        job.setJarByClass(SalesDriver.class);
+
+        // Mapper
+        job.setMapperClass(SalesMapper.class);
+        job.setMapOutputKeyClass(Text.class);
+        job.setMapOutputValueClass(SalesWritable.class);
+
+        // Combiner (same as Reducer for local aggregation)
+        job.setCombinerClass(SalesReducer.class);
+
+        // Reducer
+        job.setReducerClass(SalesReducer.class);
+        job.setNumReduceTasks(numReducers);
+
+        // Output
+        job.setOutputKeyClass(Text.class);
+        job.setOutputValueClass(SalesWritable.class);
+
+        FileInputFormat.addInputPath(job, inputPath);
+        FileOutputFormat.setOutputPath(job, outputPath);
+
+        return job.waitForCompletion(true);
+    }
+
+    private boolean runSortingJob(Configuration conf, Path inputPath, Path outputPath)
+            throws IOException, ClassNotFoundException, InterruptedException {
+
+        Job job = Job.getInstance(conf, "Sales Sorting");
+        job.setJarByClass(SalesDriver.class);
+
+        job.setMapperClass(SortMapper.class);
+        job.setMapOutputKeyClass(DoubleWritable.class);
+        job.setMapOutputValueClass(Text.class);
+
+        job.setSortComparatorClass(DescendingDoubleComparator.class);
+
+        job.setReducerClass(SortReducer.class);
+        job.setNumReduceTasks(1);
+
+        job.setOutputKeyClass(Text.class);
+        job.setOutputValueClass(NullWritable.class);
+
+        FileInputFormat.addInputPath(job, inputPath);
+        FileOutputFormat.setOutputPath(job, outputPath);
+
+        return job.waitForCompletion(true);
+    }
+
+    private void writeMetrics(int numReducers, long job1Time, long job2Time, long totalTime) {
+        try {
+            File metricsFile = new File(METRICS_FILE);
+            File parentDir = metricsFile.getParentFile();
+
+            if (parentDir != null && !parentDir.exists()) {
+                parentDir.mkdirs();
+            }
+
+            try (PrintWriter writer = new PrintWriter(new BufferedWriter(new FileWriter(metricsFile, true)))) {
+                String timestamp = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());
+                writer.println("=== Run: " + timestamp + " ===");
+                writer.println("Number of reducers: " + numReducers);
+                writer.println("Aggregation: " + job1Time + " ms");
+                writer.println("Sorting: " + job2Time + " ms");
+                writer.println("Total time: " + totalTime + " ms");
+                writer.println();
+            }
+
+            System.out.println("Metrics appended to: " + METRICS_FILE);
+
+        } catch (IOException e) {
+            System.err.println("Warning: Failed to write metrics file: " + e.getMessage());
+        }
+    }
+}
diff --git a/src/main/java/com/vitaya/para/sales/SalesMapper.java b/src/main/java/com/vitaya/para/sales/SalesMapper.java
new file mode 100644
index 0000000..38234c8
--- /dev/null
+++ b/src/main/java/com/vitaya/para/sales/SalesMapper.java
@@ -0,0 +1,56 @@
+package com.vitaya.para.sales;
+
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapreduce.Mapper;
+
+import java.io.IOException;
+
+public class SalesMapper extends Mapper<LongWritable, Text, Text, SalesWritable> {
+
+    public enum SalesCounter {
+        MALFORMED_ROWS,
+        VALID_ROWS
+    }
+
+    private final Text categoryKey = new Text();
+    private final SalesWritable salesValue = new SalesWritable();
+
+    @Override
+    protected void map(LongWritable key, Text value, Context context)
+            throws IOException, InterruptedException {
+
+        String line = value.toString().trim();
+
+        // Skip empty lines and header
+        if (line.isEmpty() || line.startsWith("transaction_id") || line.startsWith("id")) {
+            return;
+        }
+
+        String[] fields = line.split(",");
+
+        // Expected format: transaction_id,product_id,category,price,quantity
+        // Minimum required fields: at least 5
+        if (fields.length < 5) {
+            context.getCounter(SalesCounter.MALFORMED_ROWS).increment(1);
+            return;
+        }
+
+        try {
+            String category = fields[2].trim();
+            double price = Double.parseDouble(fields[3].trim());
+            int quantity = Integer.parseInt(fields[4].trim());
+
+            double revenue = price * quantity;
+
+            categoryKey.set(category);
+            salesValue.set(revenue, quantity);
+
+            context.write(categoryKey, salesValue);
+            context.getCounter(SalesCounter.VALID_ROWS).increment(1);
+
+        } catch (NumberFormatException | ArrayIndexOutOfBoundsException e) {
+            context.getCounter(SalesCounter.MALFORMED_ROWS).increment(1);
+        }
+    }
+}
diff --git a/src/main/java/com/vitaya/para/sales/SalesReducer.java b/src/main/java/com/vitaya/para/sales/SalesReducer.java
new file mode 100644
index 0000000..9e0a095
--- /dev/null
+++ b/src/main/java/com/vitaya/para/sales/SalesReducer.java
@@ -0,0 +1,27 @@
+package com.vitaya.para.sales;
+
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapreduce.Reducer;
+
+import java.io.IOException;
+
+public class SalesReducer extends Reducer<Text, SalesWritable, Text, SalesWritable> {
+
+    private final SalesWritable result = new SalesWritable();
+
+    @Override
+    protected void reduce(Text key, Iterable<SalesWritable> values, Context context)
+            throws IOException, InterruptedException {
+
+        double totalRevenue = 0.0;
+        int totalQuantity = 0;
+
+        for (SalesWritable value : values) {
+            totalRevenue += value.getRevenue();
+            totalQuantity += value.getQuantity();
+        }
+
+        result.set(totalRevenue, totalQuantity);
+        context.write(key, result);
+    }
+}
diff --git a/src/main/java/com/vitaya/para/sales/SalesWritable.java b/src/main/java/com/vitaya/para/sales/SalesWritable.java
new file mode 100644
index 0000000..9af6a99
--- /dev/null
+++ b/src/main/java/com/vitaya/para/sales/SalesWritable.java
@@ -0,0 +1,61 @@
+package com.vitaya.para.sales;
+
+import org.apache.hadoop.io.Writable;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+
+public class SalesWritable implements Writable {
+
+    private double revenue;
+    private int quantity;
+
+    public SalesWritable() {
+        this.revenue = 0.0;
+        this.quantity = 0;
+    }
+
+    public SalesWritable(double revenue, int quantity) {
+        this.revenue = revenue;
+        this.quantity = quantity;
+    }
+
+    public double getRevenue() {
+        return revenue;
+    }
+
+    public void setRevenue(double revenue) {
+        this.revenue = revenue;
+    }
+
+    public int getQuantity() {
+        return quantity;
+    }
+
+    public void setQuantity(int quantity) {
+        this.quantity = quantity;
+    }
+
+    public void set(double revenue, int quantity) {
+        this.revenue = revenue;
+        this.quantity = quantity;
+    }
+
+    @Override
+    public void write(DataOutput out) throws IOException {
+        out.writeDouble(revenue);
+        out.writeInt(quantity);
+    }
+
+    @Override
+    public void readFields(DataInput in) throws IOException {
+        revenue = in.readDouble();
+        quantity = in.readInt();
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%.2f\t%d", revenue, quantity);
+    }
+}
diff --git a/src/main/java/com/vitaya/para/sales/SortMapper.java b/src/main/java/com/vitaya/para/sales/SortMapper.java
new file mode 100644
index 0000000..e7cbb59
--- /dev/null
+++ b/src/main/java/com/vitaya/para/sales/SortMapper.java
@@ -0,0 +1,37 @@
+package com.vitaya.para.sales;
+
+import org.apache.hadoop.io.DoubleWritable;
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapreduce.Mapper;
+
+import java.io.IOException;
+
+public class SortMapper extends Mapper<LongWritable, Text, DoubleWritable, Text> {
+
+    private final DoubleWritable revenueKey = new DoubleWritable();
+
+    @Override
+    protected void map(LongWritable key, Text value, Context context)
+            throws IOException, InterruptedException {
+
+        String line = value.toString().trim();
+        if (line.isEmpty()) {
+            return;
+        }
+
+        String[] parts = line.split("\t");
+        if (parts.length < 2) {
+            return;
+        }
+
+        try {
+            double revenue = Double.parseDouble(parts[1].trim());
+            revenueKey.set(revenue);
+
+            context.write(revenueKey, value);
+
+        } catch (NumberFormatException e) {
+        }
+    }
+}
diff --git a/src/main/java/com/vitaya/para/sales/SortReducer.java b/src/main/java/com/vitaya/para/sales/SortReducer.java
new file mode 100644
index 0000000..5802bd3
--- /dev/null
+++ b/src/main/java/com/vitaya/para/sales/SortReducer.java
@@ -0,0 +1,20 @@
+package com.vitaya.para.sales;
+
+import org.apache.hadoop.io.DoubleWritable;
+import org.apache.hadoop.io.NullWritable;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapreduce.Reducer;
+
+import java.io.IOException;
+
+public class SortReducer extends Reducer<DoubleWritable, Text, Text, NullWritable> {
+
+    @Override
+    protected void reduce(DoubleWritable key, Iterable<Text> values, Context context)
+            throws IOException, InterruptedException {
+
+        for (Text value : values) {
+            context.write(value, NullWritable.get());
+        }
+    }
+}