func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int r, x1, y1, x2, y2;     cin >> r >> x1 >> y1 >> x2 >> y2;     long long int xd = x2 - x1, yd = y2 - y1;     double dist = sqrt(xd * xd + yd * yd);     long long int int_part = (int)dist;     double frac_part = dist - int_part;     long long int ans;     ans = int_part / (2 * r);     if (int_part % (2 * r) == 0 && frac_part == 0) ans--;     ans++;     cout << ans << endl;   }   