diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6ea464c..ffd031b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,8 +1,26 @@
 cmake_minimum_required(VERSION 3.25)
-project(sorting_station C)
+project(C_homework C)
+add_compile_options(-Wall -Wextra -pedantic)
 
+# Libraries
 add_library(stack src/stack_and_queue/stack/stack.c)
 
+# Executables and links with libraries
+add_executable(hello_world src/hello_world/hello_world.c)
+
+add_executable(fast_calc_of_polynom src/homework_deadline_25_sep/fast_calculation_of_polynomial/fast_calculation_of_polynomial.c)
+
+add_executable(incomplete_quotient src/homework_deadline_25_sep/incomplete_quotient/incomplete_quotient.c)
+
+add_executable(lucky_tickets src/homework_deadline_25_sep/lucky_tickets/lucky_tickets.c)
+
+add_executable(massive_reroll src/homework_deadline_25_sep/massive_reroll/massive_reroll.c)
+
 add_executable(sorting_station src/stack_and_queue/stack/sorting_station.c)
 target_link_libraries(sorting_station PRIVATE stack)
-target_compile_options(sorting_station PRIVATE -Wall -Wextra -pedantic)
+
+add_executable(number_of_zero_elements src/compilation_process/number_of_zero_elements/number_of_zero_elements.c)
+
+add_executable(simple_bracket_balance src/compilation_process/simple_bracket_balance/simple_bracket_balance.c)
+
+add_executable(search_for_a_substring src/compilation_process/search_for_a_substring/search_for_a_substring.c)
diff --git a/src/compilation_process/search_for_a_substring/search_for_a_substring.c b/src/compilation_process/search_for_a_substring/search_for_a_substring.c
new file mode 100644
index 0000000..7deed9c
--- /dev/null
+++ b/src/compilation_process/search_for_a_substring/search_for_a_substring.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main()
+{
+    char* string = NULL;
+    char* substring = NULL;
+    size_t stringSize = 0;
+    size_t substringSize = 0;
+
+    printf("Enter string: ");
+    int realStringSize = getline(&string, &stringSize, stdin);
+    printf("Enter substring: ");
+    int realSubstringSize = getline(&substring, &substringSize, stdin);
+
+    int substringCount = 0;
+    for (int i = 0; i < realStringSize - 1; i++) {
+        if (string[i] == substring[0]) {
+            substringCount++;
+            for (int j = 0; j < realSubstringSize - 1; j++) {
+                if (string[i + j] != substring[j]) {
+                    substringCount--;
+                    break;
+                }
+            }
+        }
+    }
+
+    printf("Substring count in string: %d \n", substringCount);
+
+    free(string);
+    free(substring);
+
+    return 0;
+}
diff --git a/src/hello_world/hello_world.c b/src/hello_world/hello_world.c
new file mode 100644
index 0000000..88682ec
--- /dev/null
+++ b/src/hello_world/hello_world.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main()
+{
+    printf("Hello, World!\n");
+
+    return 0;
+}