View Code of Problem 80

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