func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     double r, x1, y1, x2, y2;     cin >> r >> x1 >> y1 >> x2 >> y2;     double distance = sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));     if (distance == 0) {       cout << 0;       return 0;     }     if (distance <= 2 * r) {       cout << 1;       return 0;     }     double midDistance = distance - (2 * r);     double x = midDistance / (2 * r);     int y = x;     int z = ceil(x);     if ((z - y) == 0) {       cout << y + 1;       return 0;     } else {       cout << y + 2;     }     return 0;   }   