diff --git a/HomeworksAccept/homework21.09/read.me b/HomeworksAccept/homework21.09/read.me
deleted file mode 100644
index 5e4d090..0000000
--- a/HomeworksAccept/homework21.09/read.me
+++ /dev/null
@@ -1 +0,0 @@
-3 домашка
diff --git a/HomeworksAccept/homework28.09/read.me b/HomeworksAccept/homework28.09/read.me
deleted file mode 100644
index 5061ad0..0000000
--- a/HomeworksAccept/homework28.09/read.me
+++ /dev/null
@@ -1 +0,0 @@
-4 домашка
diff --git a/HomeworksAccept/read.me b/HomeworksAccept/read.me
deleted file mode 100644
index 1773bf8..0000000
--- a/HomeworksAccept/read.me
+++ /dev/null
@@ -1 +0,0 @@
-Здесь представлены домашнии работы, прошедшии проверку
diff --git a/parsingTree/parsingTree/main.c b/parsingTree/parsingTree/main.c
new file mode 100644
index 0000000..77a4409
--- /dev/null
+++ b/parsingTree/parsingTree/main.c
@@ -0,0 +1,121 @@
+#include "tree.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <locale.h>
+#include <stdbool.h>
+
+bool isDigit(char symbol) {
+	return symbol >= '0' && symbol <= '9';
+}
+
+bool readFromFileToTree(char fileName[], Tree* tree) {
+	int errorCode = 0;
+	FILE* file = fopen(fileName, "rt");
+	if (file == NULL) {
+		printf("���� �� ������!");
+		return false;
+	}
+	char letter = 0;
+
+	while (!feof(file)) {
+		fscanf(file, "%c", &letter);
+		if (letter == '+' || letter == '*' || letter == '/') {
+			addToTreeSymbol(tree, letter, &errorCode);
+			if (errorCode != 0) {
+				return false;
+			}
+		}
+		if (letter == '-') {
+			int symbol = getc(file);
+			if (symbol == ' ') {
+				addToTreeSymbol(tree, letter, &errorCode);
+				if (errorCode != 0) {
+					return false;
+				}
+				ungetc(symbol, file);
+			} else {
+				ungetc(symbol, file);
+				fscanf(file, "%c", &letter);
+				int number = -letter - '0';
+				fscanf(file, "%c", &letter);
+				while (isDigit(letter)) {
+					number *= 10;
+					number += letter - '0';
+					fscanf(file, "%c", &letter);
+				}
+				addToTreeNumber(tree, number, &errorCode);
+				if (errorCode != 0) {
+					return false;
+				}
+			}
+		}
+		if (isDigit(letter)) {
+			int number = (int)letter - 48;
+			fscanf(file, "%c", &letter);
+			while (isDigit(letter)) {
+				number *= 10;
+				number += (int)letter - 48;
+				fscanf(file, "%c", &letter);
+			}
+			addToTreeNumber(tree, number, &errorCode);
+			if (errorCode != 0) {
+				return false;
+			}
+		}
+	}
+	return true;
+}
+
+bool connectingFunction(char fileName[]) {
+	Tree* tree = createTree();
+	if (!readFromFileToTree(fileName, tree)) {
+		return false;
+	}
+	printTree(tree);
+	int errorCode = 0;
+	int number = postorderCount(tree, &errorCode);
+	if (errorCode != 0) {
+		return -1;
+	}
+	printf("%d\n", number);
+	clearTree(tree);
+	return true;
+}
+
+bool test() {
+	Tree* tree = createTree();
+	if (!readFromFileToTree("test.txt", tree)) {
+		return false;
+	}
+	int errorCode = 0;
+	int number = postorderCount(tree, &errorCode);
+	if (errorCode != 0) {
+		return -1;
+	}
+	clearTree(tree);
+	return number == -4;
+}
+
+int main() {
+	setlocale(LC_ALL, "RUS");
+	if (test()) {
+		printf("����� ������ �������!\n");
+	} else {
+		printf("������...\n");
+		return -1;
+	}
+	printf("������� ��� ����� � ��� �����������, ������ �� ������ ��������� 100 ��������\n");
+	char fileName[100] = { '\0' };
+	int checkScan = scanf("%s", &fileName);
+	while (checkScan != 1) {
+		while (getchar() != '\n') {
+		}
+
+		printf("������...");
+		checkScan = scanf("%s", &fileName);
+	}
+	if (!connectingFunction(fileName)) {
+		printf("������...\n");
+		return -1;
+	}
+}
\ No newline at end of file
diff --git a/parsingTree/parsingTree/stack.c b/parsingTree/parsingTree/stack.c
new file mode 100644
index 0000000..81223ce
--- /dev/null
+++ b/parsingTree/parsingTree/stack.c
@@ -0,0 +1,84 @@
+#include "stack.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+typedef struct Value {
+	int number;
+	char symbol;
+} Value;
+
+typedef struct Node {
+    Value value;
+    Node* right;
+    Node* left;
+} Node;
+
+typedef struct Unit {
+	Node* value;
+	Unit* next;
+}Unit;
+
+typedef struct Stack {
+	Unit* head;
+}Stack;
+
+Stack* createStack(void) {
+	Stack* stack = calloc(1, sizeof(stack));
+	return stack;
+}
+
+int push(Stack* stack, Node* value) {
+    Unit* temp = calloc(1, sizeof(Unit));
+    if (temp == NULL) {
+        printf("�������� � �������...");
+        return -1;
+    }
+    temp->value = value;
+    temp->next = stack->head;
+
+    stack->head = temp;
+    return 0;
+}
+
+Node* pop(Stack* stack, int* errorCode) {
+    if (stack->head == NULL) {
+        if (errorCode != NULL) {
+            *errorCode = -1;
+        }
+        return NULL;
+    }
+    if (errorCode != NULL) {
+        *errorCode = 0;
+    }
+
+    Node* value = stack->head->value;
+
+    Unit* next = stack->head->next;
+    free(stack->head);
+    stack->head = next;
+
+    return value;
+}
+
+bool isEmpty(Stack* stack) {
+    return stack->head == NULL;
+}
+
+void customDelete(Stack* stack) {
+    while (!isEmpty(stack)) {
+        int errorCode = 0;
+        Node* element = pop(stack, &errorCode);
+        free(element);
+    }
+    free(stack);
+    stack = NULL;
+}
+
+void deleteStack(Stack* stack) {
+    while (!isEmpty(stack)) {
+        int errorCode = 0;
+        pop(stack, &errorCode);
+    }
+    free(stack);
+    stack = NULL;
+}
\ No newline at end of file
diff --git a/parsingTree/parsingTree/stack.h b/parsingTree/parsingTree/stack.h
new file mode 100644
index 0000000..49b4f30
--- /dev/null
+++ b/parsingTree/parsingTree/stack.h
@@ -0,0 +1,30 @@
+#ifndef STACK_H
+#define STACK_H
+#include <stdbool.h>
+
+typedef struct Stack Stack;
+
+typedef struct Node Node;
+
+typedef struct Value Value;
+
+typedef struct Unit Unit;
+
+//�������� stack'a
+Stack* createStack(void);
+
+//���������� �������� � ������ �����
+int push(Stack* stack, Node* value);
+
+//�������� �������� �� �����(�� ������ �����)
+Node* pop(Stack* stack, int* errorCode);
+
+//�������� �� �������
+bool isEmpty(Stack* stack);
+
+//������� �����
+void deleteStack(Stack* stack);
+
+//������� ����� + ������������� �������� ������ ����
+void customDelete(Stack* stack);
+#endif
\ No newline at end of file
diff --git a/parsingTree/parsingTree/test.txt b/parsingTree/parsingTree/test.txt
new file mode 100644
index 0000000..28906b5
--- /dev/null
+++ b/parsingTree/parsingTree/test.txt
@@ -0,0 +1 @@
+(- (* (+ 2 2) 2) (* (+ 2 2) 3))
\ No newline at end of file
diff --git a/parsingTree/parsingTree/tree.c b/parsingTree/parsingTree/tree.c
new file mode 100644
index 0000000..93d4b83
--- /dev/null
+++ b/parsingTree/parsingTree/tree.c
@@ -0,0 +1,204 @@
+#include "tree.h"
+#include "stack.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+
+typedef struct Value {
+	int number;
+	char symbol;
+} Value;
+
+typedef struct Node {
+	Value value;
+	Node* right;
+	Node* left;
+} Node;
+
+typedef struct Tree {
+	Node* root;
+} Tree;
+
+Tree* createTree(void) {
+	Tree* tree = calloc(1, sizeof(tree));
+	return tree;
+}
+
+Node* createNode(void) {
+	Node* temp = calloc(1, sizeof(Node));
+	return temp;
+}
+
+Node* nonRecursivePreorder(Node* root, int* errorCode) {
+	Stack* stack = createStack();
+	Node* current = root;
+	while (true) {
+		if (current != NULL) {
+			if (current->value.symbol == 0 && current->value.number == 0) {
+				return current;
+			}
+			push(stack, current);
+			current = current->left;
+		}
+		else {
+			if (isEmpty(stack)) {
+				free(stack);
+				return NULL;
+			}
+			current = pop(stack, errorCode);
+			if (*errorCode != 0) {
+				return NULL;
+			}
+			current = current->right;
+		}
+	}
+	deleteStack(stack);
+	return NULL;
+}
+
+void addToTreeSymbol(Tree* tree, char symbol, int* errorCode) {
+	if (tree == NULL) {
+		*errorCode = -1;
+		return;
+	}
+	if (tree->root == NULL) {
+		tree->root = createNode();
+		if (tree->root == NULL) {
+			*errorCode = -1;
+			return;
+		}
+		tree->root->value.symbol = symbol;
+		tree->root->left = createNode();
+		if (tree->root->left == NULL) {
+			*errorCode = -1;
+			return;
+		}
+		tree->root->right = createNode();
+		if (tree->root == NULL) {
+			*errorCode = -1;
+			return;
+		}
+		return;
+	}
+	Node* newRoot = nonRecursivePreorder(tree->root, errorCode);
+	if (*errorCode != 0 || newRoot == NULL) {
+		*errorCode = -1;
+		return;
+	}
+	newRoot->value.symbol = symbol;
+	newRoot->left = createNode();
+	if (newRoot->left == NULL) {
+		*errorCode = -1;
+		return;
+	}
+	newRoot->right = createNode();
+	if (newRoot->right == NULL) {
+		*errorCode = -1;
+		return;
+	}
+}
+
+void addToTreeNumber(Tree* tree, int number, int* errorCode) {
+	
+	if (tree == NULL || tree->root == NULL) {
+		*errorCode = -1;
+		return;
+	}
+	Node* newRoot = nonRecursivePreorder(tree->root, errorCode);
+	if (*errorCode != 0 || newRoot == NULL) {
+		*errorCode = -1;
+		return;
+	}
+	newRoot->value.number = number;
+}
+
+void postorderHelp(Node* root, Stack* stack, Stack* stackToClear) {
+	if (root != NULL) {
+		postorderHelp(root->left, stack, stackToClear);
+		postorderHelp(root->right, stack, stackToClear);
+		if (root->value.symbol != 0) {
+			int errorCode = 0;
+			Node* element = pop(stack, &errorCode);
+			int secondNumber = element->value.number;
+			element = pop(stack, &errorCode);
+			Node* newElement = createNode();
+			int firstNumber = element->value.number;
+			int newNumber = 0;
+			if (root->value.symbol == '+') {
+				newNumber = firstNumber + secondNumber;
+			} else if (root->value.symbol == '*') {
+				newNumber = firstNumber * secondNumber;
+			} else if (root->value.symbol == '-') {
+				newNumber = firstNumber - secondNumber;
+			} else {
+				newNumber = firstNumber / secondNumber;
+			}
+			newElement->value.number = newNumber;
+			push(stack, newElement);
+			push(stackToClear, newElement);
+		} else {
+			push(stack, root);
+		}
+	}
+}
+
+void infix(Node* root, int isNeedStample) {
+	if (root != NULL) {
+		if (root->value.symbol != 0) {
+			printf("(%c ", root->value.symbol);
+			++isNeedStample;
+		} else {
+			if (isNeedStample == 0) {
+				printf("%d ", root->value.number);
+			} else {
+				printf("%d", root->value.number);
+				while (isNeedStample != 0) {
+					printf(")");
+					--isNeedStample;
+				}
+				printf(" ");
+			}
+		}
+		infix(root->left, 0);
+		infix(root->right, isNeedStample);
+	}
+}
+
+void printTree(Tree* tree) {
+	if (tree == NULL) {
+		return;
+	}
+	infix(tree->root, 0);
+	printf("\n");
+}
+
+int postorderCount(Tree* tree, int* errorCode) {
+	Stack* stack = createStack();
+	Stack* stackToClear = createStack();
+	postorderHelp(tree->root, stack, stackToClear);
+	Node* newElement = pop(stack, errorCode);
+	if (*errorCode != 0 || newElement == NULL) {
+		return 0;
+	}
+	int number = newElement->value.number;
+	customDelete(stackToClear);
+	return number;
+}
+
+void postorderDelete(Node* root) {
+	if (root != NULL) {
+		postorderDelete(root->left);
+		postorderDelete(root->right);
+		free(root);
+		root = NULL;
+	}
+}
+
+void clearTree(Tree* tree) {
+	if (tree == NULL) {
+		return;
+	}
+	postorderDelete(tree->root);
+	free(tree);
+	tree = NULL;
+}
\ No newline at end of file
diff --git a/parsingTree/parsingTree/tree.h b/parsingTree/parsingTree/tree.h
new file mode 100644
index 0000000..efdcba8
--- /dev/null
+++ b/parsingTree/parsingTree/tree.h
@@ -0,0 +1,23 @@
+#ifndef TREE_H
+#define TREE_H
+
+typedef struct Tree Tree;
+
+//�������� ������
+Tree* createTree(void);
+
+//���������� � ������ ��������, ���������� �� ������� int'� � ��������� char'�
+void addToTreeSymbol(Tree* tree, char symbol, int* errorCode);
+
+//���������� � ������ ��������, ���������� �� ��������� int'� � ������� char'�
+void addToTreeNumber(Tree* tree, int number, int* errorCode);
+
+// ������� �������� ���������, ������������ � ������
+int postorderCount(Tree* tree, int* errorCode);
+
+//�������� ������
+void printTree(Tree* tree);
+
+//������� ������
+void clearTree(Tree* tree);
+#endif
\ No newline at end of file
diff --git a/parsingTreeNew/parsingTreeNew.sln b/parsingTreeNew/parsingTreeNew.sln
new file mode 100644
index 0000000..f771b6d
--- /dev/null
+++ b/parsingTreeNew/parsingTreeNew.sln
@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "parsingTreeNew", "parsingTreeNew\parsingTreeNew.vcxproj", "{733ABB93-2B1F-48F0-B050-3DB11AF05EA5}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{733ABB93-2B1F-48F0-B050-3DB11AF05EA5}.Debug|x64.ActiveCfg = Debug|x64
+		{733ABB93-2B1F-48F0-B050-3DB11AF05EA5}.Debug|x64.Build.0 = Debug|x64
+		{733ABB93-2B1F-48F0-B050-3DB11AF05EA5}.Debug|x86.ActiveCfg = Debug|Win32
+		{733ABB93-2B1F-48F0-B050-3DB11AF05EA5}.Debug|x86.Build.0 = Debug|Win32
+		{733ABB93-2B1F-48F0-B050-3DB11AF05EA5}.Release|x64.ActiveCfg = Release|x64
+		{733ABB93-2B1F-48F0-B050-3DB11AF05EA5}.Release|x64.Build.0 = Release|x64
+		{733ABB93-2B1F-48F0-B050-3DB11AF05EA5}.Release|x86.ActiveCfg = Release|Win32
+		{733ABB93-2B1F-48F0-B050-3DB11AF05EA5}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {EA3F37A8-33E7-4249-BFEB-E26D8F0E43D3}
+	EndGlobalSection
+EndGlobal
diff --git a/parsingTreeNew/parsingTreeNew/main.c b/parsingTreeNew/parsingTreeNew/main.c
new file mode 100644
index 0000000..967163b
--- /dev/null
+++ b/parsingTreeNew/parsingTreeNew/main.c
@@ -0,0 +1,123 @@
+#include "tree.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <locale.h>
+#include <stdbool.h>
+
+bool isDigit(char symbol) {
+	return symbol >= '0' && symbol <= '9';
+}
+
+bool readFromFileToTree(char fileName[], Tree* tree) {
+	int errorCode = 0;
+	FILE* file = fopen(fileName, "rt");
+	if (file == NULL) {
+		printf("���� �� ������!");
+		return false;
+	}
+	char letter = 0;
+
+	while (!feof(file)) {
+		fscanf(file, "%c", &letter);
+		if (letter == '+' || letter == '*' || letter == '/') {
+			addToTreeSymbol(tree, letter, &errorCode);
+			if (errorCode != 0) {
+				return false;
+			}
+		}
+		if (letter == '-') {
+			int symbol = getc(file);
+			if (symbol == ' ') {
+				addToTreeSymbol(tree, letter, &errorCode);
+				if (errorCode != 0) {
+					return false;
+				}
+				ungetc(symbol, file);
+			}
+			else {
+				ungetc(symbol, file);
+				fscanf(file, "%c", &letter);
+				int number = -letter - '0';
+				fscanf(file, "%c", &letter);
+				while (isDigit(letter)) {
+					number *= 10;
+					number += letter - '0';
+					fscanf(file, "%c", &letter);
+				}
+				addToTreeNumber(tree, number, &errorCode);
+				if (errorCode != 0) {
+					return false;
+				}
+			}
+		}
+		if (isDigit(letter)) {
+			int number = (int)letter - 48;
+			fscanf(file, "%c", &letter);
+			while (isDigit(letter)) {
+				number *= 10;
+				number += (int)letter - 48;
+				fscanf(file, "%c", &letter);
+			}
+			addToTreeNumber(tree, number, &errorCode);
+			if (errorCode != 0) {
+				return false;
+			}
+		}
+	}
+	return true;
+}
+
+bool connectingFunction(char fileName[]) {
+	Tree* tree = createTree();
+	if (!readFromFileToTree(fileName, tree)) {
+		return false;
+	}
+	printTree(tree);
+	int errorCode = 0;
+	int number = postorderCount(tree, &errorCode);
+	if (errorCode != 0) {
+		return -1;
+	}
+	printf("%d\n", number);
+	clearTree(tree);
+	return true;
+}
+
+bool test() {
+	Tree* tree = createTree();
+	if (!readFromFileToTree("test.txt", tree)) {
+		return false;
+	}
+	int errorCode = 0;
+	int number = postorderCount(tree, &errorCode);
+	if (errorCode != 0) {
+		return -1;
+	}
+	clearTree(tree);
+	return number == -4;
+}
+
+int main() {
+	setlocale(LC_ALL, "RUS");
+	if (test()) {
+		printf("����� ������ �������!\n");
+	}
+	else {
+		printf("������...\n");
+		return -1;
+	}
+	printf("������� ��� ����� � ��� �����������, ������ �� ������ ��������� 100 ��������\n");
+	char fileName[100] = { '\0' };
+	int checkScan = scanf("%s", &fileName);
+	while (checkScan != 1) {
+		while (getchar() != '\n') {
+		}
+
+		printf("������...");
+		checkScan = scanf("%s", &fileName);
+	}
+	if (!connectingFunction(fileName)) {
+		printf("������...\n");
+		return -1;
+	}
+}
\ No newline at end of file
diff --git a/parsingTreeNew/parsingTreeNew/parsingTreeNew.vcxproj b/parsingTreeNew/parsingTreeNew/parsingTreeNew.vcxproj
new file mode 100644
index 0000000..37ddfe4
--- /dev/null
+++ b/parsingTreeNew/parsingTreeNew/parsingTreeNew.vcxproj
@@ -0,0 +1,156 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>16.0</VCProjectVersion>
+    <Keyword>Win32Proj</Keyword>
+    <ProjectGuid>{733abb93-2b1f-48f0-b050-3db11af05ea5}</ProjectGuid>
+    <RootNamespace>parsingTreeNew</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <SDLCheck>false</SDLCheck>
+      <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="main.c" />
+    <ClCompile Include="stack.c" />
+    <ClCompile Include="tree.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="stack.h" />
+    <ClInclude Include="tree.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <Text Include="test.txt" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/parsingTreeNew/parsingTreeNew/parsingTreeNew.vcxproj.filters b/parsingTreeNew/parsingTreeNew/parsingTreeNew.vcxproj.filters
new file mode 100644
index 0000000..79302ee
--- /dev/null
+++ b/parsingTreeNew/parsingTreeNew/parsingTreeNew.vcxproj.filters
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Исходные файлы">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Файлы заголовков">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd</Extensions>
+    </Filter>
+    <Filter Include="Файлы ресурсов">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="main.c">
+      <Filter>Исходные файлы</Filter>
+    </ClCompile>
+    <ClCompile Include="stack.c">
+      <Filter>Исходные файлы</Filter>
+    </ClCompile>
+    <ClCompile Include="tree.c">
+      <Filter>Исходные файлы</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="stack.h">
+      <Filter>Исходные файлы</Filter>
+    </ClInclude>
+    <ClInclude Include="tree.h">
+      <Filter>Исходные файлы</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <Text Include="test.txt">
+      <Filter>Исходные файлы</Filter>
+    </Text>
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/parsingTreeNew/parsingTreeNew/stack.c b/parsingTreeNew/parsingTreeNew/stack.c
new file mode 100644
index 0000000..fb9a743
--- /dev/null
+++ b/parsingTreeNew/parsingTreeNew/stack.c
@@ -0,0 +1,84 @@
+#include "stack.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+typedef struct Value {
+    int number;
+    char symbol;
+} Value;
+
+typedef struct Node {
+    Value value;
+    Node* right;
+    Node* left;
+} Node;
+
+typedef struct Unit {
+    Node* value;
+    Unit* next;
+}Unit;
+
+typedef struct Stack {
+    Unit* head;
+}Stack;
+
+Stack* createStack(void) {
+    Stack* stack = calloc(1, sizeof(stack));
+    return stack;
+}
+
+int push(Stack* stack, Node* value) {
+    Unit* temp = calloc(1, sizeof(Unit));
+    if (temp == NULL) {
+        printf("�������� � �������...");
+        return -1;
+    }
+    temp->value = value;
+    temp->next = stack->head;
+
+    stack->head = temp;
+    return 0;
+}
+
+Node* pop(Stack* stack, int* errorCode) {
+    if (stack->head == NULL) {
+        if (errorCode != NULL) {
+            *errorCode = -1;
+        }
+        return NULL;
+    }
+    if (errorCode != NULL) {
+        *errorCode = 0;
+    }
+
+    Node* value = stack->head->value;
+
+    Unit* next = stack->head->next;
+    free(stack->head);
+    stack->head = next;
+
+    return value;
+}
+
+bool isEmpty(Stack* stack) {
+    return stack->head == NULL;
+}
+
+void customDelete(Stack* stack) {
+    while (!isEmpty(stack)) {
+        int errorCode = 0;
+        Node* element = pop(stack, &errorCode);
+        free(element);
+    }
+    free(stack);
+    stack = NULL;
+}
+
+void deleteStack(Stack* stack) {
+    while (!isEmpty(stack)) {
+        int errorCode = 0;
+        pop(stack, &errorCode);
+    }
+    free(stack);
+    stack = NULL;
+}
\ No newline at end of file
diff --git a/parsingTreeNew/parsingTreeNew/stack.h b/parsingTreeNew/parsingTreeNew/stack.h
new file mode 100644
index 0000000..49b4f30
--- /dev/null
+++ b/parsingTreeNew/parsingTreeNew/stack.h
@@ -0,0 +1,30 @@
+#ifndef STACK_H
+#define STACK_H
+#include <stdbool.h>
+
+typedef struct Stack Stack;
+
+typedef struct Node Node;
+
+typedef struct Value Value;
+
+typedef struct Unit Unit;
+
+//�������� stack'a
+Stack* createStack(void);
+
+//���������� �������� � ������ �����
+int push(Stack* stack, Node* value);
+
+//�������� �������� �� �����(�� ������ �����)
+Node* pop(Stack* stack, int* errorCode);
+
+//�������� �� �������
+bool isEmpty(Stack* stack);
+
+//������� �����
+void deleteStack(Stack* stack);
+
+//������� ����� + ������������� �������� ������ ����
+void customDelete(Stack* stack);
+#endif
\ No newline at end of file
diff --git a/parsingTreeNew/parsingTreeNew/test.txt b/parsingTreeNew/parsingTreeNew/test.txt
new file mode 100644
index 0000000..28906b5
--- /dev/null
+++ b/parsingTreeNew/parsingTreeNew/test.txt
@@ -0,0 +1 @@
+(- (* (+ 2 2) 2) (* (+ 2 2) 3))
\ No newline at end of file
diff --git a/parsingTreeNew/parsingTreeNew/tree.c b/parsingTreeNew/parsingTreeNew/tree.c
new file mode 100644
index 0000000..7a2b069
--- /dev/null
+++ b/parsingTreeNew/parsingTreeNew/tree.c
@@ -0,0 +1,210 @@
+#include "tree.h"
+#include "stack.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+
+typedef struct Value {
+    int number;
+    char symbol;
+} Value;
+
+typedef struct Node {
+    Value value;
+    Node* right;
+    Node* left;
+} Node;
+
+typedef struct Tree {
+    Node* root;
+} Tree;
+
+Tree* createTree(void) {
+    Tree* tree = calloc(1, sizeof(Tree));
+    return tree;
+}
+
+Node* createNode(void) {
+    Node* temp = calloc(1, sizeof(Node));
+    return temp;
+}
+
+Node* nonRecursivePreorder(Node* root, int* errorCode) {
+    Stack* stack = createStack();
+    Node* current = root;
+    while (true) {
+        if (current != NULL) {
+            if (current->value.symbol == 0 && current->value.number == 0) {
+                return current;
+            }
+            push(stack, current);
+            current = current->left;
+        }
+        else {
+            if (isEmpty(stack)) {
+                free(stack);
+                return NULL;
+            }
+            current = pop(stack, errorCode);
+            if (*errorCode != 0) {
+                return NULL;
+            }
+            current = current->right;
+        }
+    }
+    deleteStack(stack);
+    return NULL;
+}
+
+void addToTreeSymbol(Tree* tree, char symbol, int* errorCode) {
+    if (tree == NULL) {
+        *errorCode = -1;
+        return;
+    }
+    if (tree->root == NULL) {
+        tree->root = createNode();
+        if (tree->root == NULL) {
+            *errorCode = -1;
+            return;
+        }
+        tree->root->value.symbol = symbol;
+        tree->root->left = createNode();
+        if (tree->root->left == NULL) {
+            *errorCode = -1;
+            return;
+        }
+        tree->root->right = createNode();
+        if (tree->root == NULL) {
+            *errorCode = -1;
+            return;
+        }
+        return;
+    }
+    Node* newRoot = nonRecursivePreorder(tree->root, errorCode);
+    if (*errorCode != 0 || newRoot == NULL) {
+        *errorCode = -1;
+        return;
+    }
+    newRoot->value.symbol = symbol;
+    newRoot->left = createNode();
+    if (newRoot->left == NULL) {
+        *errorCode = -1;
+        return;
+    }
+    newRoot->right = createNode();
+    if (newRoot->right == NULL) {
+        *errorCode = -1;
+        return;
+    }
+}
+
+void addToTreeNumber(Tree* tree, int number, int* errorCode) {
+
+    if (tree == NULL || tree->root == NULL) {
+        *errorCode = -1;
+        return;
+    }
+    Node* newRoot = nonRecursivePreorder(tree->root, errorCode);
+    if (*errorCode != 0 || newRoot == NULL) {
+        *errorCode = -1;
+        return;
+    }
+    newRoot->value.number = number;
+}
+
+void postorderHelp(Node* root, Stack* stack, Stack* stackToClear) {
+    if (root == NULL) {
+        return;
+    }
+    postorderHelp(root->left, stack, stackToClear);
+    postorderHelp(root->right, stack, stackToClear);
+    if (root->value.symbol != 0) {
+        int errorCode = 0;
+        Node* element = pop(stack, &errorCode);
+        int secondNumber = element->value.number;
+        element = pop(stack, &errorCode);
+        Node* newElement = createNode();
+        int firstNumber = element->value.number;
+        int newNumber = 0;
+        if (root->value.symbol == '+') {
+            newNumber = firstNumber + secondNumber;
+        }
+        else if (root->value.symbol == '*') {
+            newNumber = firstNumber * secondNumber;
+        }
+        else if (root->value.symbol == '-') {
+            newNumber = firstNumber - secondNumber;
+        }
+        else {
+            newNumber = firstNumber / secondNumber;
+        }
+        newElement->value.number = newNumber;
+        push(stack, newElement);
+        push(stackToClear, newElement);
+    }
+    else {
+        push(stack, root);
+    }
+}
+
+void infix(Node* root, int isNeedStample) {
+    if (root != NULL) {
+        if (root->value.symbol != 0) {
+            printf("(%c ", root->value.symbol);
+            ++isNeedStample;
+        }
+        else {
+            if (isNeedStample == 0) {
+                printf("%d ", root->value.number);
+            }
+            else {
+                printf("%d", root->value.number);
+                while (isNeedStample != 0) {
+                    printf(")");
+                    --isNeedStample;
+                }
+                printf(" ");
+            }
+        }
+        infix(root->left, 0);
+        infix(root->right, isNeedStample);
+    }
+}
+
+void printTree(Tree* tree) {
+    if (tree == NULL) {
+        return;
+    }
+    infix(tree->root, 0);
+    printf("\n");
+}
+
+int postorderCount(Tree* tree, int* errorCode) {
+    Stack* stack = createStack();
+    Stack* stackToClear = createStack();
+    postorderHelp(tree->root, stack, stackToClear);
+    Node* newElement = pop(stack, errorCode);
+    if (*errorCode != 0 || newElement == NULL) {
+        return 0;
+    }
+    int number = newElement->value.number;
+    customDelete(stackToClear);
+    return number;
+}
+
+void postorderDelete(Node* root) {
+    if (root != NULL) {
+        postorderDelete(root->left);
+        postorderDelete(root->right);
+        free(root);
+        root = NULL;
+    }
+}
+
+void clearTree(Tree* tree) {
+    if (tree == NULL) {
+        return;
+    }
+    postorderDelete(tree->root);
+    free(tree);
+}
\ No newline at end of file
diff --git a/parsingTreeNew/parsingTreeNew/tree.h b/parsingTreeNew/parsingTreeNew/tree.h
new file mode 100644
index 0000000..efdcba8
--- /dev/null
+++ b/parsingTreeNew/parsingTreeNew/tree.h
@@ -0,0 +1,23 @@
+#ifndef TREE_H
+#define TREE_H
+
+typedef struct Tree Tree;
+
+//�������� ������
+Tree* createTree(void);
+
+//���������� � ������ ��������, ���������� �� ������� int'� � ��������� char'�
+void addToTreeSymbol(Tree* tree, char symbol, int* errorCode);
+
+//���������� � ������ ��������, ���������� �� ��������� int'� � ������� char'�
+void addToTreeNumber(Tree* tree, int number, int* errorCode);
+
+// ������� �������� ���������, ������������ � ������
+int postorderCount(Tree* tree, int* errorCode);
+
+//�������� ������
+void printTree(Tree* tree);
+
+//������� ������
+void clearTree(Tree* tree);
+#endif
\ No newline at end of file