func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long n;     int m;     cin >> n >> m;     long long cnt = 0;     if (m == 1) {       cout << n * n << endl;       return 0;     }     if (m < n) {       for (int i = 1; i <= m; i++)         for (int j = 1; j <= m; j++)           if ((i * i + j * j) % m == 0) cnt++;       long long mul = n / m;       mul = mul * mul;       cnt *= mul;       long long index = (n / m) * m;       index++;       if (index <= n) {         long long cnt1 = 0;         for (long long i = index; i <= n; i++)           for (long long j = 1; j <= m; j++) {             long long i1 = i % m;             long long j1 = j % m;             if ((i1 * i1 + j1 * j1) % m == 0) cnt1++;           }         mul = n / m;         mul *= 2;         cnt1 *= mul;         cnt += cnt1;         for (long long i = index; i <= n; i++)           for (long long j = index; j <= n; j++) {             long long i1 = i % m;             long long j1 = j % m;             if ((i1 * i1 + j1 * j1) % m == 0) cnt++;           }       }     } else {       for (int i = 1; i <= n; i++)         for (int j = 1; j <= n; j++)           if ((i * i + j * j) % m == 0) cnt++;     }     cout << cnt << endl;     return 0;   }   