1809B - Points on Plane - CodeForces Solution

#include<bits/stdc++.h>
#include<iostream>
using namespace std;
// #define int long long
 
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        long long n;
        cin>>n;
        long long p=sqrt(n);
        if(n==1)
        {
            cout<<0<<endl;
        }
        else if(p*p==n)
        {
            cout<<p-1<<endl;
        }
        else
        {
            cout<<p<<endl;
        }
    }
 
}