AtCoder Beginner Contest 056 B - NarrowRectanglesEasy Solution

Problem Link:  https://atcoder.jp/contests/abc056/tasks/abc056_b 

Solution in C++:

///La ilaha illellahu muhammadur rasulullah

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

///Abul Hasnat  Tonmoy

///Department of CSE,23rd batch

///Islamic University,Bangladesh

#include <bits/stdc++.h>

using namespace std;

int main()

{

    long long w,a,b,s;

   cin>>w>>a>>b;

   if(a>b)

    swap(a,b);

   s=b-(a+w);

   if(s<0)

    cout<<"0"<<endl;

   else

    cout<<s<<endl;

}