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 v5.12) (judge verdict: Runtime Error)

process.stdin.resume();
process.stdin.setEncoding('utf8');  // 書き出しのお約束

// 入力受付
var lines = '';
var reader = require('readline').createInterface({
  input: process.stdin,
  output: process.stdout
});
reader.on('line', (line) => {
  lines = line;
});                         // 入力受付ここまで

// 以下、処理から出力まで
reader.on('close', () => {
  var ans = 'No';
  var nums = lines.split(' ')[0];
  var x = lines.split(' ')[1];
  if (nums >= x) {
    ans = 'Yes';
    console.log(ans);   //出力
});