palindromeNumber

這個是leetcode中判斷是否爲迴文的python代碼，我的主要想法是每一次比較首位和末尾的數字是否相同，然後丟棄兩位再進行判斷

a = input()
a = int(a)
if a < 0:
    print(False)
else:
    b = a
    i = 0
    while  b:
        i = i + 1
        b = b // 10
    length = i
    b = a
    sign = 0
    while length > 1:
        if b // pow(10,length - 1) == b % 10:
            b = b % pow(10,length-1)
            b= b // 10
            length = length - 2
        else:
            sign = 1
            break
    if sign == 0:
        print(True)
    else:
        print(False)