Pinta-ala

#include <iostream>
#include <map>
#include <vector>
#include <cmath>
using namespace std;
using ll = long long;

int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  ll t;
  cin >> t;
  for (int tt = 0; tt < t; ++tt) {
    ll a, b;
    cin >> a >> b;
    if (((1+a-b)*(1+a-b)-4*a) < 0) {
      cout << "NO" << endl;
    }
    else {
        float y1 = (-(1+a-b)+sqrt((1+a-b)*(1+a-b)-4*a))/2;
        float y2 = (-(1+a-b)-sqrt((1+a-b)*(1+a-b)-4*a))/2;
        if (y1 <= 0 && y2 <= 0) cout << "NO" << endl;
        else cout << "YES" << endl;
    }
  }
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED