KEYENCE Programming Contest 2019 Solution

A - Beginning

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 1 #include <bits/stdc++.h>
 2 using namespace std;
 3 
 4 int main()
 5 {
 6     int a[4];
 7     while (scanf("%d", a) != EOF)
 8     {
 9         for (int i = 1; i < 4; ++i) scanf("%d", a + i);
10         sort(a, a + 4);
11         int res = 0;
12         for (int i = 0; i < 4; ++i) res = res * 10 + a[i];
13         puts(res == 1479 ? "YES" : "NO");
14     }
15     return 0;
16 }

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