View Code of Problem 80

#include <stdio.h>
int main()
{
	int n,i,b,a=0;
  	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);   
        }
}