#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<ll, ll>;
using T = tuple<ll, ll, ll>;
// #include <atcoder/all>
// using namespace atcoder;
// using mint = modint1000000007;
#define rep(i, n) for(ll i = 0; i < n; i++)

int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);

    cout << setprecision(10) << fixed;
    
    ll n; cin >> n;
    vector<double> a(n), b(n);
    rep(i,n) cin >> a[i] >> b[i];
    rep(i,n) {
        ll left = 1, right = 1e16;
        while( right-left > 1 ) {
            ll mid = (right+left)/2;
            bool f = ( (double)(sqrt(a[i])+sqrt(b[i])) < (double)mid);
            if( f ) right = mid;
            else left = mid;
        }
        cout << right << endl;
    }
    
    return 0;
}