Codeforces 1426C. Increase and Copy Solution

Solution in C++:

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

///AH Tonmoy

///Department of CSE,23rd batch

///Islamic University,Bangladesh   

#include<bits/stdc++.h>

using namespace std;

int main()

{

    double  t,i,j,n,v;

    cin>>t;

    while(t--)

    {

        cin>>n;

        if(n==1)

            cout<<"0"<<endl;

        else

        {

            v =ceil(2*(sqrt(n)));

            cout<<v-2<<endl;

        }

    }

}