Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example, "A man, a plan, a canal: Panama" is a palindrome. "race a car" is not a palindrome. Note: Have you consider that…
LeetCode初级算法的Python实现--字符串 # 反转字符串 def reverseString(s): return s[::-1] # 颠倒数字 def reverse(x): if x < 0: flag = -2 ** 31 result = -1 * int(str(x)[1:][::-1]) if result < flag: return 0 else: return result else: flag = 2 ** 31 - 1 result = int(str(x)[…