#include <stdio.h>
 
int main()
{
    int num;
    do
    {
        if (scanf("%d", &num) != 1)
        {
            fseek(stdin, 0, SEEK_END);
        }
        printf("%d\n", num);
    } while (num < 0 || num > 2);
    printf("%d", num);
    return 0;
}