#include <bits/stdc++.h>
using namespace std;

void fast_io() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
}

int main() {
	fast_io();
	int n;
	cin >> n;
	for (int i = 0; i < n; i++) {
		long long a, b;
		cin >> a >> b;
		long long ans = max(0LL, (long long)(sqrt(a) + sqrt(b)) - 2);
		while (ans * ans <= a + b ||
			   (ans * ans - a - b) * (ans * ans - a - b) <= 4 * a * b) {
			ans++;
		}
		cout << ans << "\n";
	}
}