'''****** Задание ********
  *А роза упала на лапу Азора 2.0.
'''
num = int(input())
original_num = num
reversed_num = 0
while num > 0:
    digit = num % 10
    reversed_num = reversed_num * 10 + digit
    num //= 10
if original_num == reversed_num:
    print('YES')
else:
    print('NO')