func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     int a[3];     while (t--) {       memset(a, 0, sizeof(a));       int n;       cin >> n;       for (int i = 0; i < n; i++) {         int in;         cin >> in;         a[in % 3]++;       }       if (a[2] >= a[1]) {         cout << a[0] + a[1] + ((a[2] - a[1]) / 3) << endl;       } else {         cout << a[0] + a[2] + ((a[1] - a[2]) / 3) << endl;       }     }     return 0;   }   