View Code of Problem 80

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