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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int T;
    cin >> T;
    while(T--){
        ll a, b;
        cin >> a >> b;
        ll ng = -1, ok = 1ll << 31, mid;
        while(ng + 1 < ok){
            mid = (ng + ok) / 2;
            if(a * b <= mid * mid) ok = mid;
            else ng = mid;
        }
        ll v = a + b + 2 * ok;
        ng = -1, ok = 1ll << 31 + (a * b == mid * mid ? -1 : 0);
        while(ng + 1 < ok){
            mid = (ng + ok) / 2;
            if(v < mid * mid) ok = mid;
            else ng = mid;
        }
        cout << ok << '\n';
    }
}