func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int A[3] = {0};     int num;     cin >> num;     long ip;     while (num--) {       cin >> ip;       if (ip % 3 == 0)         A[0]++;       else if (ip % 3 == 1)         A[1]++;       else if (ip % 3 == 2)         A[2]++;     }     cout << A[0] / 2 + min(A[1], A[2]);     return 0;   }   