#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 ng = 0, ok = a + b + 1;
		while (ng + 1 < ok) {
			long long mid = (ng + ok) / 2;
			long long m_sq = mid * mid;
			if (m_sq <= a + b) {
				ng = mid;
				continue;
			}
			if (4 * a * b / (m_sq - a - b) > m_sq - a - b) {
				ng = mid;
				continue;
			}
			if (4 * a * b < (m_sq - a - b) * (m_sq - a - b)) {
				ok = mid;
			} else {
				ng = mid;
			}
		}
		cout << ok << "\n";
	}
}