#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> PP;
//#define MOD 1000000007
#define MOD 998244353
#define INF 2305843009213693951
//#define INF 810114514
#define PI 3.141592653589
#define setdouble setprecision
#define REP(i,n) for(ll i=0;i<(n);++i)
#define OREP(i,n) for(ll i=1;i<=(n);++i)
#define RREP(i,n) for(ll i=(n)-1;i>=0;--i)
#define ALL(v) (v).begin(), (v).end()
#define GOODBYE do { cout << "-1" << endl; return 0; } while (false)
#define MM <<" "<<
#define Endl endl
#define debug true
#define debug2 false


int main(void){
    //cin.tie(nullptr);
    //ios::sync_with_stdio(false);
    
    ll N;
    cin >> N;
    vector<ll> A(N),B(N);
    REP(i,N){
        cin >> A[i] >> B[i];
    }

    REP(i,N){
        long double a = sqrt((long double)A[i]);
        long double b = sqrt((long double)B[i]);

        a += b;
        long long M = a;

        long long ok = M+100, ng = max(1ll,M-100), mid;

        while(abs(ok-ng)>1){
            mid = (ok+ng)/2;

            ll R = mid*mid-A[i]-B[i];
            if(R<0){ng=mid;continue;}

            R *= R;
            ll L = 4*A[i]*B[i];

            if(L<R){
                ok = mid;
            }else{
                ng = mid;
            }


        }

        cout << ok << endl;


    }

    
    return 0;
}