#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--){
        unsigned long long a, b;
        cin >> a >> b;
        unsigned long long ng = -1, ok = 1ll << 30, mid;
        while(ng + 1 < ok){
            mid = (ng + ok) / 2;
            if(a * b <= mid * mid) ok = mid;
            else ng = mid;
        }
        bool flag = (a * b == ok * ok);
        unsigned long long v = a + b + 2 * ok;
        ng = -1, ok = (1ll << 32) - 1;
        while(ng + 1 < ok){
            mid = ng + (ok - ng) / 2;
            if(v <= mid * mid) ok = mid;
            else ng = mid;
        }
        if(flag && v == ok * ok) ok++;
        cout << ok << '\n';
    }
}