#include <bits/stdc++.h>
using namespace std;
using ll=long long;
using pll=pair<ll,ll>;
using tll=tuple<ll,ll,ll>;
using ld=long double;
const ll INF=(1ll<<60);
#define rep(i,n) for (ll i=0;i<(ll)(n);i++)
#define all(v) v.begin(),v.end()
template<class T> void chmin(T &a,T b){
    if(a>b){
        a=b;
    }
}
template<class T> void chmax(T &a,T b){
    if(a<b){
        a=b;
    }
}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    ll n;
    cin >> n;
    while(n--){
        ld a,b;
        cin >> a >> b;
        a=sqrtl(a);
        b=sqrtl(b);
        ll ok=INF,ng=0;
        while(1<abs(ok-ng)){
            ll mid=(ok+ng)/2;
            if(a+b<mid) ok=mid;
            else ng=mid;
        }
        cout << ok << '\n';
    }
}