Pinta-ala

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int,int> P;
#define REDIR ifstream f("input.txt"); cin.rdbuf(f.rdbuf());
int n,t;
int sums[4];

bool ok(double leveys, int a, int b) {
    double korkeus = a / leveys;
    if ((korkeus+1) * (leveys+1) > b) return true;
    return false;
}
int main() {
    //REDIR;
    cin >> t;
    while (t--) {
        double a,b; cin >> a >> b;


        double z = 0;
        for (double k = 1 << 18; k>0.0000001; k/=2) {
            while (!ok(z+k, a, b)) z += k;
        }
        if (z == 0) {
            cout << "NO\n";
            continue;
        }
        double sum = ((a/z+1) * (z+1));
        bool onsamat = (abs(sum - b) < 0.001);
        //cout << (z+1) << " " << (a/z+1) << endl;
        //cout << (z+1) * (a/z+1) << " " << b<< endl;
        //cout << "SUM: " << sum << " " << b << " " << onsamat<< endl;
        if (onsamat) cout << "YES\n";
        else cout << "NO\n";

    }
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: WRONG ANSWER