View Code of Problem 80

#include<iostream>
#include<bits/stdc++.h>
#include<string.h>
using namespace std;

int main(){
	
	int n;
	while(cin>>n&&n!=0){
		int num=0;
		for(int i=2;i<=n;i++){
			num=(num+3)%i;
		}
		cout<<num+1<<endl;
	}
	
	return 0;
		
}