XOR and OR

题意翻译

给定两个$01$ 串$,$ 问$A$ 是否可以通过相邻两位的异或和或操作得到$B$ 串。 >异或$:01/10\to11,11\to10/01$ >或$:10/01\to11$ 感谢@Kelin 提供的翻译

题目描述

The Bitlandians are quite weird people. They do everything differently. They have a different alphabet so they have a different definition for a string. A Bitlandish string is a string made only of characters "0" and "1". BitHaval (the mayor of Bitland) loves to play with Bitlandish strings. He takes some Bitlandish string $ a $ , and applies several (possibly zero) operations to it. In one operation the mayor may take any two adjacent characters of a string, define one of them as $ x $ and the other one as $ y $ . Then he calculates two values $ p $ and $ q $ : $ p=x xor y $ , $ q=x or y $ . Then he replaces one of the two taken characters by $ p $ and the other one by $ q $ . The $ xor $ operation means the bitwise excluding OR operation. The $ or $ operation is the bitwise OR operation. So for example one operation can transform string 11 to string 10 or to string 01. String 1 cannot be transformed into any other string. You've got two Bitlandish strings $ a $ and $ b $ . Your task is to check if it is possible for BitHaval to transform string $ a $ to string $ b $ in several (possibly zero) described operations.

输入输出格式

输入格式

The first line contains Bitlandish string $ a $ , the second line contains Bitlandish string $ b $ . The strings can have different lengths. It is guaranteed that the given strings only consist of characters "0" and "1". The strings are not empty, their length doesn't exceed $ 10^{6} $ .

输出格式

Print "YES" if $ a $ can be transformed into $ b $ , otherwise print "NO". Please do not print the quotes.

输入输出样例

输入样例 #1

11
10

输出样例 #1

YES

输入样例 #2

1
01

输出样例 #2

NO

输入样例 #3

000
101

输出样例 #3

NO