func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(false);     cin.tie(0);     int test;     cin >> test;     while (test--) {       int a, b, x, y;       cin >> a >> b;       if (a < b) swap(a, b);       bool ok = 1;       x = 2 * a - b;       if (x % 3 != 0) ok = 0;       y = x / 3;       if ((a + b) % 3 != 0) ok = 0;       x = (a + b) / 3 - y;       if (x < 0 || y < 0) ok = 0;       cout << (ok ?  YES n  :  NO n );     }     return 0;   }   