ABC150A - 500 Yen Coins

問題：A - 500 Yen Coins

#include <iostream>
using namespace std;

int main(void) {
    int k, x;

    cin.tie(0);
    ios::sync_with_stdio(false);
    cin >> k >> x;
    cout << (x <= k * 500? "Yes" : "No") << "\n";
    return 0;
}