func_code_string: #include <bits/stdc++.h>   using namespace std;   int heights(long long int n) {     long long int count = 0, m, k;     for (long long int x = 1; x <= n; x++) {       m = 3 * x * x + x;       if (m > 2 * n)         break;       else {         k = x + n;         if (k % 3 == 0) count++;       }     }     return count;   }   int main() {     long long int n;     cin >> n;     cout << heights(n);     cout << endl;     return 0;   }   