func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     long long a, b, c, d;     cin >> a >> b >> c >> d;     if (a + b == c + d || a + c == b + d || a + d == b + c || a + b + c == d ||         a + c + d == b || b + c + d == a || a + b + d == c) {       cout <<  YES n ;     } else {       cout <<  NO n ;     }   }   