#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 4000000000000000001



int main(){
	
	int _t;
	cin>>_t;
	
	rep(_,_t){
		
		long long a,b;
		cin>>a>>b;
		
		__int128 ok = 4100000000;
		__int128 ng = 0;
		while(ok-ng>1){
			__int128 mid = (ok+ng)/2;
			__int128 t = mid*mid;
			t -= a+b;
			//cout<<(long long)mid<<','<<(long long)t<<endl;
			if(t<=0){
				ng = mid;
				continue;
			}
			t *= t;
			t -= a*b*4;
			//cout<<(long long)mid<<','<<(long long)t<<endl;
			if(t > 0)ok = mid;
			else ng = mid;
		}
		cout<<(long long)ok<<endl;
		
	}
	return 0;
}