func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     double m, n;     long long int r, a, b, c, d, dist, sim;     cin >> r >> a >> b >> c >> d;     dist = (c - a) * (c - a) + (d - b) * (d - b);     m = sqrt(dist);     m = m / 2;     c = m / r;     m = m / r;     if (m == c)       cout << c;     else       cout << c + 1;     return 0;   }   