#include <stdio.h>
#include <time.h>
#include <conio.h>
#include <math.h>
#include <string.h>
#include <windows.h>

int main() {
	int namsinh;
	printf_s("Nhap nam sinh cua ban:\n");
	scanf_s("%d", &namsinh);
	time_t t = time(0);
	struct tm* now = localtime(&t);
	printf("So tuoi: %d", now->tm_year - namsinh);
	_getch();
}