#include <bits/stdc++.h>
using namespace std;
int main(){
  int N;
  cin >> N;
  for (int i = 0; i < N; i++){
    long long A, B;
    cin >> A >> B;
    long long tv = 70000, fv = 0;
    while (tv - fv > 1){
      long long mid = (tv + fv) / 2;
      long long R = mid * mid - A - B;
      if (R <= 0){
        fv = mid;
      } else {
        if (4 * A * B < R * R){
          tv = mid;
        } else {
          fv = mid;
        }
      }
    }
    cout << tv << endl;
  }
}