#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); ++i)

inline ll ceilsqrt(ll x) {
  ll ok = 2.5e9, ng = 0;
  while (ok - ng > 1) {
    ll mid = (ok + ng) / 2;
    (mid * mid >= x ? ok : ng) = mid;
  }
  return ok;
}

int main() {
  int n;
  cin >> n;
  while (n--) {
    ll a, b;
    cin >> a >> b;
    ll t = a + b + ceilsqrt(4 * a * b) + 1;
    cout << ceilsqrt(t) << endl;
  }
  return 0;
}