[C++] 1011 - Fly me to the Alpha Centauri

문제 링크 : https://www.acmicpc.net/problem/1011

1011번: Fly me to the Alpha Centauri

 

 

 

#include<iostream>
#include<math.h>
 
#define endl '\n'
 
using namespace std;
 
int main(void)
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    
    int t;
    int x, y;
    int len;
    long long i;
 
    cin >> t;
    while(t--)
    {
        cin >> x >> y;
        y-=x;
        x = 0;
        for( i = 1; i*i < y; ++i);
 
        cout << i + ceil(((double)y-i)/i) << endl;
    }
 
    return 0;
}