#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) {
  unsigned long long ok = 3e9, ng = 0;
  while (ok - ng > 1) {
    ll mid = (ok + ng) / 2;
    (mid * mid >= x ? ok : ng) = mid;
  }
  return ok;
}

inline ll floorsqrt(ll x) {
  unsigned long long ok = 0, ng = 3e9;
  while (ng - ok > 1) {
    ll mid = (ok + ng) / 2;
    (mid * mid > x ? ng : ok) = 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);
    cout << floorsqrt(t) + 1 << endl;
  }
  return 0;
}