Is Palindrome - Toph.co - Begginer

A = list(input())

isPalindrome = True
i=1
while i <= int(len(A)/2):
    if len(A)%2 == 0:
        if A[i-1] != A[len(A)-i]:
            isPalindrome = False
            break
    else:
        if A[i-1] != A[len(A)-i]:
            isPalindrome = False
            break
    i += 1

if isPalindrome:
    print('Yes')
else:
    print('No')