#include<bits/stdc++.h>
using namespace std;
using ll = unsigned long long;
bool hantei(ll A,ll B,ll X){
    if(4*A*B<(X*X-A-B)*(X*X-A-B))return true;
    return false;
}
ll x(ll A,ll B){
    //4AB<(X^2-A-B)^2となるような、最小のX
    ll l = 1;//ng
    ll r = 6000000009;//ok
    while(r-l>1){
        ll mid = (l+r)/2;
        if(hantei(A,B,mid))r = mid;
        else l = mid;
    }
    return r;
    
    
}
ll N;
int main(){
    cin >> N;
    //√A+√B < X
    //A+B+2√AB<X^2
    //2√AB<X^2-A-B
    //4AB<(X^2-A-B)^2
    for(ll i = 0;i < N;i++){
        ll A,B;cin >> A >> B;
        cout << x(A,B) << endl;
    }
    
    
}