Codeforces Round #287 (Div. 2) 507B - Amr and Pins Solution

Problem Link : https://codeforces.com/problemset/problem/507/B

For know hypot function :  https://www.geeksforgeeks.org/hypot-hypotf-hypotl-c/

  Solution in C++:

///La ilaha illellahu muhammadur rasulullah

///******Bismillahir-Rahmanir-Rahim******///

///Abul Hasnat  Tonmoy

///Department of CSE,23rd batch

///Islamic University,Bangladesh

///**********ALLAH IS ALMIGHTY************///

#include <bits/stdc++.h>

using namespace std;

int main()

{

    long long   r,x,y,x1,y1;

    cin>>r>>x>>y>>x1>>y1;

    cout <<ceil((hypot(x-x1,y-y1))/(2*r))<<endl;

    return 0;

}