#include <cassert>
#include <cmath>
#include <algorithm>
#include <iostream>
#include <iomanip>
#include <climits>
#include <map>
#include <queue>
#include <set>
#include <cstring>
#include <vector>

using namespace std;
typedef long long ll;

int main() {
  int N;
  cin >> N;

  for (int i = 0; i < N; ++i) {
    ll a, b;
    cin >> a >> b;

    ll ok = 1000000000;
    ll ng = 0;

    while (abs(ok - ng) >= 2) {
      __int128 x = (ok + ng) / 2;
      __int128 v = x * x - (a + b);

      if (v >= 0 && 4 * a * b < v * v) {
        ok = x;
      } else {
        ng = x;
      }
    }

    cout << ok << endl;
  }

  return 0;
}