View Code of Problem 80

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