diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..733caac
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,14 @@
+CC=gcc-11
+CFLAGS=-g -Wall -Wextra -O0
+LDFLAGS=
+SOURCES=main.c config.h structs.h
+OBJECTS=$(SOURCES:.cpp=.o)
+EXECUTABLE=work1
+
+all: $(SOURCES) $(EXECUTABLE)
+	
+$(EXECUTABLE): $(OBJECTS) 
+	$(CC) $(LDFLAGS) $(OBJECTS) -o $@
+
+.cpp.o:
+	$(CC) $(CFLAGS) $< -o $@
\ No newline at end of file
diff --git a/No3 (1).docx b/No3 (1).docx
new file mode 100644
index 0000000..6d750ab
Binary files /dev/null and b/No3 (1).docx differ
diff --git a/config.h b/config.h
new file mode 100644
index 0000000..86b4c42
--- /dev/null
+++ b/config.h
@@ -0,0 +1,79 @@
+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define _CRT_SECURE_NO_WARNINGS
+//#define DEBUG
+
+#include <stdio.h>
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+// #include <malloc.h>
+#include <time.h>
+#include <stdint.h>
+#include <locale.h>
+#include <sys/stat.h>
+
+// input console checking
+#define HELP_CONSOLE_OPTION_1 "-h"
+#define HELP_CONSOLE_OPTION_2 "--help"
+#define GENKEY_CONSOLE_OPTION "genkey"
+#define SIGNATURE_CONSOLE_OPTION "sign"
+#define CHECK_CONSOLE_OPTION "check"
+#define ENCRYPT_CONSOLE_OPTION "encrypt"
+#define DECRYPT_CONSOLE_OPTION "decrypt"
+#define SIZE_CONSOLE_OPTION "--size"
+#define PUBKEY_CONSOLE_OPTION "--pubkey"
+#define SECRET_CONSOLE_OPTION "--secret"
+#define SIGFILE_CONSOLE_OPTION "--sigfile"
+#define INFILE_CONSOLE_OPTION "--infile"
+#define OUTFILE_CONSOLE_OPTION "--outfile"
+
+// boolean
+#define BOOL int
+#define TRUE 1
+#define FALSE 0
+
+// RSA
+#define KEYSIZE_MODULE 256
+typedef enum {
+	KEY_256 = 256,
+	KEY_512 = 512,
+	KEY_1024 = 1024,
+	KEY_2048 = 2048
+} KEY_BIT_SIZE;
+
+// file
+#define FILE_OPENING_ERROR "Cannot open the %s file.\n"
+
+#define primes_128_bit_filename "primes_128_bit.blackleague"
+#define primes_256_bit_filename "primes_256_bit.blackleague"
+#define primes_512_bit_filename "primes_512_bit.blackleague"
+#define primes_1024_bit_filename "primes_1024_bit.blackleague"
+
+/// <summary>
+/// Exit codes for exit()
+/// </summary>
+enum EXIT_CODE {
+	SUCCESS,
+	FAILURE,
+	NO_ARGUMENTS_FAILURE,
+	WRONG_ARGUMENT_FAILURE,
+	NOT_ENOUGH_ARGUMENTS_FAILURE,
+	FILE_OPEN_FAILURE,
+	FILE_FORMAT_FAILURE,
+	LOG_FAILURE,
+	MEMORY_ALLOCATION_FAILURE,
+	GET_PRIME_FAILURE,
+	GET_NUMBER_FAILURE,
+	DEBUG_EXIT_CODE = 100
+};
+
+// fast funcs
+#define swap(a,b); b = a+b; a = b-a; b = b-a;
+#ifdef _WIN32
+#else
+#define max(a,b) (a>b)? a : b
+#endif
+
+#endif // !CONFIG_H
\ No newline at end of file
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..8a005f5
--- /dev/null
+++ b/main.c
@@ -0,0 +1,8 @@
+#include "structs.h"
+
+int main()
+{
+    File new_file = createFile();
+    printf("%s\n", new_file.creation_time);
+    return 0;
+}
\ No newline at end of file
diff --git a/structs.h b/structs.h
new file mode 100644
index 0000000..0e79e0e
--- /dev/null
+++ b/structs.h
@@ -0,0 +1,27 @@
+#include "config.h"
+
+#define extinsion_lenth 5
+#define filename_lenth 10
+#define creation_time_length 17
+
+
+typedef struct
+{
+    char creation_time[creation_time_length+1];
+    char filename[filename_lenth+1];
+    char extension[extinsion_lenth+1];
+}File;
+
+File createFile()
+{
+    time_t time_now;
+    struct tm* time_info;
+    File result = {"\0","\0","\0"};
+
+    time(&time_now);
+    time_info = localtime(&time_now);
+
+    strftime (result.creation_time,creation_time_length,"%T %D",time_info);
+
+    return result;
+}
\ No newline at end of file