#include <bits/stdc++.h>
using namespace std;
#define overload4(_1, _2, _3, _4, name, ...) name
#define rep1(n) for(int i = 0; i < (int)(n); ++i)
#define rep2(i, n) for(int i = 0; i < (int)(n); ++i)
#define rep3(i, a, b) for(int i = (a); i < (int)(b); ++i)
#define rep4(i, a, b, c) for(int i = (a); i < (int)(b); i += (c))
#define rep(...) overload4(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__)
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using u16 = uint16_t;
int main(){
	int N;
	cin >> N;
	auto isok = [](__uint128_t x, __uint128_t a, __uint128_t b){
		if((x*x - a - b) < 0)return false;
		else return 4*a*b < ((x*x - a - b) * (x*x - a - b));
	};
	rep(i,N){
		ll a,b;
		cin >> a >> b;
		ll ok = 1000'000'00ll;
		ll ng = 1;
		while(abs(ok - ng) > 1ll){
			ll mid = (ok + ng)/2ll;
			if(isok(mid, a, b))ok = mid;
			else ng = mid;
		}
		cout << ok << endl;
	}
}