View Code of Problem 80

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



}