#include <bits/stdc++.h>
#include<atcoder/all>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using namespace atcoder;
#define all(a) a.begin(),a.end()
typedef long long ll;
typedef pair<ll,int> P;
typedef vector<ll> vi;
constexpr ll inf=1ll<<61;
constexpr ll mod=998244353;
typedef modint998244353 mi;

int main(){
    int n;cin>>n;
    rep(i,n){
        ll a,b;cin>>a>>b;
        ll lb=0,ub=70000;
        while(ub-lb>1){
            ll mi=(ub+lb)/2;
            if(mi*mi-a-b<0)lb=mi;
            else{
                if(4*a*b<(mi*mi-a-b)*(mi*mi-a-b))ub=mi;
                else lb=mi;
            }
        }
        cout<<ub<<endl;
    }
}