func_code_string: #include <bits/stdc++.h>   using namespace std;   const int INF = 1e9 + 7;   const int MAXN = 1e6 + 7;   const double EPS = 1e-8;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     long long n, m;     cin >> n >> m;     vector<long long> cnt(m, 0);     long long d = n % m;     for (long long i = 0; i < m; i++) {       cnt[i * i % m] += n / m;       if (i && i <= d) {         cnt[i * i % m]++;       }     }     long long res = 0;     for (long long i = 0; i < m; i++) {       res += cnt[i] * cnt[(m - i) % m];     }     cout << res;   }   