Submission #3998594

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Source Code Expand

#include <iostream>
#include <string>
#include <vector>
#include <deque>
#include <map>
#include <algorithm>
#include <cstdlib>
#include <cmath>
#include <numeric>
#include <utility>

#define ALL_OF(x) (x).begin(), (x).end()
#define REP(i,n) for(int i=0, i##_len=(n); i<i##_len; i++)
template<class T> bool chmax(T &a, const T &b) {if (a < b) {a = b; return 1;} return 0; }
template<class T> bool chmin(T &a, const T &b) {if (a > b) {a = b; return 1;} return 0; }

typedef long long ll;
using namespace std;

int main() {
    
    vector<int> n(4, 0);
    REP(i, 4) cin >> n[i];
    sort(ALL_OF(n));
    if (n[0] == 1 && n[1] == 4 && n[2] == 7 && n[3] == 9) {
        cout << "YES" << endl;
    } else {
        cout << "NO" << endl;
    }
    
}

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