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A14669. Reverse

编程题 普及/提高-

题目描述

You are given two positive integers $x$ and $y$ . You can perform the following operation with $x$ : write it in its binary form without leading zeros, add $0$ or $1$ to the right of it, reverse the binary form and turn it into a decimal number which is assigned as the new value of $x$ .

For example:

- $34$ can be turned into $81$ via one operation: the binary form of $34$ is $100010$ , if you add $1$ , reverse it and remove leading zeros, you will get $1010001$ , which is the binary form of $81$ .
- $34$ can be turned into $17$ via one operation: the binary form of $34$ is $100010$ , if you add $0$ , reverse it and remove leading zeros, you will get $10001$ , which is the binary form of $17$ .
- $81$ can be turned into $69$ via one operation: the binary form of $81$ is $1010001$ , if you add $0$ , reverse it and remove leading zeros, you will get $1000101$ , which is the binary form of $69$ .
- $34$ can be turned into $69$ via two operations: first you turn $34$ into $81$ and then $81$ into $69$ .

Your task is to find out whether $x$ can be turned into $y$ after a certain number of operations (possibly zero).

输入格式

The only line of the input contains two integers $x$ and $y$ ( $1 \le x, y \le 10^{18}$ ).

输出格式

Print YES if you can make $x$ equal to $y$ and NO if you can't.

输入输出样例

输入 #1
3 3
输出 #1
YES
输入 #2
7 4
输出 #2
NO
输入 #3
2 8
输出 #3
NO
输入 #4
34 69
输出 #4
YES
输入 #5
8935891487501725 71487131900013807
输出 #5
YES

说明/提示

In the first example, you don't even need to do anything.

The fourth example is described in the statement.
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