func_code_string: #include <bits/stdc++.h>   using namespace std;   long long ll(long double x) { return x; }   int main() {     int n;     cin >> n;     while (n--) {       long long a, b;       cin >> a >> b;       if (ceil((2 * a - b) / 3.0) == floor((2 * a - b) / 3.0) and           ceil((2 * b - a) / 3.0) == floor((2 * b - a) / 3.0) and           ceil((2 * b - a) / 3.0) >= 0 and ((2 * a - b) / 3.0) >= 0)         cout <<  YES  << endl;       else         cout <<  NO  << endl;     }   }   