View Code of Problem 80

#include <stdio.h>
#define max 100
int main()
{
	int num=0,i,n;
	while(scanf("%d",&n) != EOF&&n != 0){
		for(i = 1;i <= n;i ++){
			num = (num+3) % i;
		} 
		printf("%d\n",num+1);
	}
}