#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define rep(i, n) for (long long i = 0; i < (long long)(n); i++)
#define repn(i,end) for(long long i = 0; i <= (long long)(end); i++)
#define reps(i,start,end) for(long long i = start; i < (long long)(end); i++)
#define repsn(i,start,end) for(long long i = start; i <= (long long)(end); i++)
#define ll long long
#define ld long double
#define print(t) cout << t << endl 
#define all(a)  (a).begin(),(a).end()
// << std::fixed << std::setprecision(0)
const ll INF = 1LL << 60;
 
template<class T> bool chmin(T& a, T b){
 if(a > b){
  a = b;
  return true;
 }
  return false;
}
 
template<class T> bool chmax(T& a, T b){
 if(a < b){
  a = b;
  return true;
 }
  return false;
}
  
ll lpow(ll x,ll n){
  ll ans = 1;
  while(n >0){
    if(n & 1)ans *= x;
    x *= x;
    n >>= 1;
  }
  return ans;
}

bool f(ll x,ll a,ll b){
  if(4 * a * b < (x* x - a -b) * (x * x - a- b)){
    return true;
  }else{
    return false;
  }
}
 
int main(){
  ll n;cin >> n;
  rep(i,n){
    ll a,b;cin >> a >> b;
    ll big = ((ll)sqrt(lpow(10,9))+100) * 2;
    ll sml = -1;
    while(big -sml > 1){
      ll mid = (big+sml)/2;
      if(f(mid,a,b)){
        big = mid;

      }else{
        sml = mid;
      }
    }
    cout << big << endl;
  }
}