#include<iostream>
#include<vector>
using namespace std;

int main() {
	int s;
	double w, h;
	std::vector <int> fat;
	while (std::cin >> s >> w >> h) {
		if (w / h / h >= 25){
			fat.push_back(s);
		}
	}
	for (int i = 0; i < fat.size(); i++){
		cout << fat[i] << endl;
	}
	return 0;
}