Problem Description
Give you two numbers A and B, if A is equal to B, you should print "YES", or print "NO".
Input
each test case contains two numbers A and B.
Output
for each case, if A is equal to B, you should print "YES", or print "NO".
Sample Input
1 2
2 2
3 3
4 3
Sample Output
NO
YES
YES
NO
可以使用位运算来做,在计算机里面只有二进制,那么可以使用异或来做,因为两个位不相同才为1,假如每个位都是一样的,则得出的为0,所以,A异或B为0,则A==B。