Codechef Starters 40 Division 3 (Unrated) Infinity Staircase Problem Code: INFINITY Solution

 

Problem Link: https://www.codechef.com/START40C/problems/INFINITY

 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()

{

    int  n,x,y,t,r,i,ma,mb,c,d,e,f;

    cin>>t;

    while(t--)

    {

        cin>>n;

        if((n-1)%5==0)

            cout<<(n/5)*2<<endl;

        else

        {

            c=(n-1)%5;

            x=((n-1)/5)*2;

            if(c==1)

                x+=1;

            else if(c==2||c==3)

                x+=1;

            else if(c==4)

                x+=2;

            cout<<x<<endl;

        }

    }

}