func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAXN = (int)1e6 + 5;   const int INF = (int)1e9 + 7;   int main() {     ios_base ::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     long long int a, b, c, d;     cin >> a >> b >> c >> d;     if (a + b == c + d or a + c == b + d or a + d == c + b or a + b + c == d or         a + c + d == b or a + b + d == c or a == b + c + d) {       cout <<  YES ;       return 0;     }     cout <<  NO ;   }   