View Code of Problem 80

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