#include <iostream>

using namespace std;

typedef long long int ll;



int main() {
	int n;
	cin >> n;
	for (int i = 0; i < n; i++) {
		int a;
		cin >> a;
		if (a <= 437) {
			cout << "Crash " << i + 1;
			//system("pause");
			return 0;
		}
	}
	cout << "No crash";
	//system("pause");
	return 0;
}