Problem:
Score : 100 points

Problem Statement

Takahashi has K 500-yen coins. (Yen is the currency of Japan.)
If these coins add up to X yen or more, print Yes; otherwise, print No.

Constraints

1 \leq K \leq 100

1 \leq X \leq 10^5

Input

Input is given from Standard Input in the following format:

K X

Output

If the coins add up to X yen or more, print Yes; otherwise, print No.

Sample Input 1

2 900

Sample Output 1

Yes

Two 500-yen coins add up to 1000 yen, which is not less than X = 900 yen.

Sample Input 2

1 501

Sample Output 2

No

One 500-yen coin is worth 500 yen, which is less than X = 501 yen.

Sample Input 3

4 2000

Sample Output 3

Yes

Four 500-yen coins add up to 2000 yen, which is not less than X = 2000 yen.

Solution in JavaScript (Node.js 12.16.1) (judge verdict: Accepted)

"use strict";

function main(input) {
  input = input.trim().split(" ");
  const K = parseInt(input[0]);
  const X = parseInt(input[1]);
  const coin = 500;
  if (coin * K >= X) {
    console.log("Yes");
  } else {
    console.log("No");
  }
}

main(require("fs").readFileSync("/dev/stdin", "utf-8"));