danhuazhou的博客

Roman to IntegerGiven a roman numeral, convert it to an integer.Input is guaranteed to be within the range from 1 to 3999.mycodeclass Solution:    def romanToInt(self, s):        """        :type s: s...

Palindrome NumberDetermine whether an integer is a palindrome. Do this without extra space.mycodeclass Solution:    def isPalindrome(self, x):        """        :type x: int        :rtype: bool       ...

Reverse IntegerGiven a 32-bit signed integer, reverse digits of an integer.Note:Assume we are dealing with an environment which could only hold integers within the 32-bit signed integer range. For the...

Two SumGiven an array of integers, return indices of the two numbers such that they add up to a specific target.You may assume that each input would have exactly one solution, and you may not use the ...