func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     long long n, ans = 0, a, b = 0, N;     cin >> N;     for (long long i = 1; i <= 1e6; i++) {       n = N;       a = i * 2;       n -= a;       b = ((i - 1) * (i * 3) / 2);       n -= b;       if (n < 0) break;       if (n % 3 == 0) ans++;     }     cout << ans;     return 0;   }   