#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i,a,b) for(ll i=(ll)(a);i<(ll)(b);i++)
#define rrep(i,a,b) for(ll i=(ll)(a-1);i>=(ll)(b);i--)
#define MOD 998244353
//#define MOD 1e9+7
#define INF 1e16
//#define PI numbers::pi
//#define E numbers::e
template <typename T> bool chmax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
template <typename T> bool chmin(T& a,T b){if(a>b){a=b;return 1;}return 0;}

int main(){
    ll n; cin >> n;
    while(n--){
        ll a,b; cin >> a >> b;
        long double m=2*sqrt(a*b);
        ll small=0,big=70000;
        while(big-small>1){
            ll x=(big+small)/2;
            if(2*sqrt(a*b)<x*x-a-b) big=x;
            else small=x;
        }
        cout << big << endl;
    }
}