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A_-_World_Cup.cpp
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A_-_World_Cup.cpp
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#include<bits/stdc++.h>
#define Rajat_Joshi main;
#define CSE ios_base::sync_with_stdio(false);
#define Joshi cin.tie(NULL);
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <sstream>
#include <queue>
#include <deque>
#include <bitset>
#include <iterator>
#include <list>
#include <stack>
#include <map>
#include <set>
#include <functional>
#include <numeric>
#include <utility>
#include <limits>
#include <time.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
using namespace std;
#define read(type) readInt<type>()
#define ll long long
#define nL
#define pb push_back
#define mk make_pair
#define pii pair<int, int>
#define a first
#define b second
#define vi vector<int>
#define all(x) (x).begin(), (x).end()
#define umap unordered_map
#define uset unordered_set
#define MOD 1000000007
#define imax INT_MAX
#define imin INT_MIN
#define exp 1e9
#define sz(x) (int((x).size()))
int32_t main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
// int ttt; cin >> ttt;
// while(ttt--) {
int y;cin>>y;
if(y%4!=0 and y%2==0){cout<<y<<"\n";}
else if (y%4==2 and y%2==2){cout<<y+2<<"\n";}
else if(y%4==3 and y%2==0){cout<<y+3<<"\n";}
else{cout<<y+2<<"\n";}
return 0;
}