Submission #2485464

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Source Code Expand

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cstdio>
#include <numeric>
#include <cmath>
#include <map>
#include <set>
#define ull unsigned long long
#define ll long long
using namespace std;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    string s;
    cin >> s;
    for(int i=0;i<s.size();i++){
        if(i==3){cout << s[i] << ' ';}
        else cout << s[i];
    }
    cout << endl;
    return 0;
}

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