View Code of Problem 80

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