#include <stdio.h>
#include <conio.h>
#include "header.h"
int main ()
{
    printf ("Choose problem(0 to exit):\n");
    printf ("1. problem 1 variant 18\n");
    printf ("2. problem 2 variant 18\n");
    char c = '*';
    while (c<='0' || c>='3')
    {
    c = getch ();
    if (c=='1') problem1();
    else
    if (c=='2') problem2();
    else
    if (c=='0')
    {
        printf ("Successfully exit\n");
        break;
    }
    else
    printf ("Error, try again\n");
    }

    return 0;
}