Submission #890309

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Source Code Expand

#include<iostream>
#include<cstdio>
#include<cmath>
#include<algorithm>
#include<string>
#include<cstring>
#include<cstdlib>
#include<utility>
#include<map>
#include<vector>
#include<stack>
#include<queue>
#define loop(i,a,b) for(int i=a;i<b;i++)
#define rep(i,a) loop(i,0,a)
#define pi acos(-1)
using namespace std;
typedef pair<int,int> p;
typedef long long ll;

int main(){
	string s;
	cin>>s;
	string a;
	rep(i,s.size()){
		if(i==4)a+=' ';
		a+=s[i];
	}
	cout<<a<<endl;
	return 0;
}

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