View Code of Problem 80

#include<stdlib.h>
#include<stdio.h>

int main(){
	int n;
	while((scanf("%d",&n)!=EOF)&& n!=0){
		int s = 0;
		for(int i=2; i<=n ; i++){
			s = (s+3)%i;
		}
		printf("%d\n",s+1);
	}
	

	return 0;
}