Submission #2112812

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Source Code Expand

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

#define INF 1.1e9
#define LINF 1.1e18
#define FOR(i,a,b) for (int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
#define pb push_back
#define pf push_front
#define fi first
#define se second
#define BIT(x,n) bitset<n>(x)
#define PI 3.14159265358979323846

typedef long long ll;
typedef pair<int,long double> P;
typedef pair<ll,P> PP;

//-----------------------------------------------------------------------------

string s;

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);

	cin>>s;
	REP(i,s.size()) {
		cout<<s[i];
		if(i==3) cout<<' ';
	}
	cout<<endl;

	return 0;
}

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