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EIPNUM - Palindromic Number

A palindromic number is a number that remains the same when its digits are reversed

Input

An integer N(N<=10^9).

Output

if N is a palindromic number, print "YES", otherwise print"NO".

Example

Input:
131

Output:
YES
Input:
1321

Output:
NO

Added by:Ha Minh Ngoc
Date:2017-10-29
Time limit:1s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
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