func_code_string: #include <bits/stdc++.h>   using namespace std;   void doRoutine() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);   }   long long int gcd(long long int a, long long int b) {     return b ? gcd(b, a % b) : a;   }   signed main() {     doRoutine();     vector<long long int> a(6);     long long int s = 0;     for (long long int i = 0; i < 6; i++) {       cin >> a[i];       s += a[i];     }     for (long long int i = 0; i < 6; i++) {       for (long long int j = 0; j < 6; j++) {         for (long long int l = 0; l < 6; l++) {           if (i != j && j != l && l != i) {             if (a[i] + a[j] + a[l] == s - a[i] - a[j] - a[l])               return cout <<  YES  <<   n , 0;           }         }       }     }     cout <<  NO  <<   n ;     return 0;   }   