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Reverse Words in a String 单词取反 whowhoha@outlook.com Question: Given an input string s, reverse the string word by word. For example, given s = "the sk 阅读全文
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Implement strstr() 实现strstr函数功能 whowhoha@outlook.com Question: Implement strstr(). Returns the index of the first occurrence of needle in haystack, or 阅读全文
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Valid Palindrome回文数 whowhoha@outlook.com Question: Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignor 阅读全文
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Two Sum II – Input array is sorted whowhoha@outlook.com Question: Similar to Question [1. Two Sum], except that the input array is already sorted in a 阅读全文
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Question: Design and implement a TwoSum class. It should support the following operations: add and find. add(input) – Add the number input to an inter 阅读全文