#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  int Q;
  cin>>Q;
  while(Q--){
  	int a,b;
  	cin>>a>>b;
  	int x = 2e9;
  	for(int i=30;i>=0;i--){
  		int y = x-(1<<i);
  		if(y*y > a+b && y > 0) x = y; 
  	}
  	int xx = x;
  	x = 8e4;
  	for(int i=30;i>=0;i--){
  		int y = x-(1<<i);
  		if(y < xx) continue;
  		if(4*a*b < (y*y-a-b)*(y*y-a-b)) x = y;
  	}
  	cout<<x<<endl;
  }
}