View Code of Problem 80

#include <stdio.h>
#include <stdlib.h>
int main()
{
    int N,a=0,i,b;
    scanf("%d",&N);
    while(N!=0)
    {
        b=0;
        for(i=2;i<=N;i++)
        {
          b=(b+3)%i;
 
        }
        printf("%d\n",b+1);
        scanf("%d",&N);
    }
    return 0;
}