#include<iostream>
#include<vector>
#include<algorithm>
#include<string>
#include<cstdio>
using namespace std;
int main(){
    int N;
    cin >> N;
    for(int i=N-100;i<=N+100;i++){
        if(i>0&&i%4==0) {
            cout << i;  
            break;
        }
    }
    return 0;
}