Pinta-ala

#include <bits/stdc++.h>
 
 
using namespace std;
 
int main() {
    vector<pair<long long, long long>> v;
    long long t, A, B;
    cin >> t;
    for (int i=0; i<t; i++) {
        cin >> A >> B;
        v.push_back({A,B});
    }
    for (auto x: v) {
        auto A = x.first; auto B = x.second;
        long long D = (A+1-B)*(A+1-B) - 4*A;
        if (D < 0 || A+1-B > 0) cout << "NO\n";
        else cout << "YES\n";
    }
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED