Problem:
Score : 100 points

Problem Statement

You are given a three-digit positive integer N.

Determine whether N is a palindromic number.

Here, a palindromic number is an integer that reads the same backward as forward in decimal notation.

Constraints

100≤N≤999

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

If N is a palindromic number, print Yes; otherwise, print No.

Sample Input 1

575

Sample Output 1

Yes

N=575 is also 575 when read backward, so it is a palindromic number. You should print Yes.

Sample Input 2

123

Sample Output 2

No

N=123 becomes 321 when read backward, so it is not a palindromic number. You should print No.

Sample Input 3

812

Sample Output 3

No

Solution in Python (3.4.3) (judge verdict: Runtime Error)

a = input().split()
ast = int(a[0])
aen = int(a[1])
bst = int(a[2])
ben = int(a[3])
if ast > ben or bst > aen:
    print("0")
elif ast < bst and aen < ben:
    print(aen - bst)
elif ast < bst and aen > ben:
    print(ben - bst)
elif bst < ast and ben < aen:
    print(ben -ast)
elif bst < ast and ben > aen:
    print(aen - ast)
elif ast == bst and aen < ben:
    print(aen - ast)
elif ast == bst and aen > ben:
    print(ben - ast)
elif ast < bst and aen == ben:
    print(ben - bst)
elif ast > bst and aen == ben:
    print(aen - ast)
elif ast == bst and aen == ben:
    print(aen - ast)
else:
    print("0")