摘要：
Given an array of integers, every element appearsthreetimes except for one. Find that single one.Note:Your algorithm should have a linear runtime comp... 阅读全文
摘要：
Given an array of integers, every element appearstwiceexcept for one. Find that single one.Note:Your algorithm should have a linear runtime complexity... 阅读全文
摘要：
Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists.解题：普通做法三步... 阅读全文
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Determine if a Sudoku is valid, according to:Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are filled with ... 阅读全文
摘要：
Implement strStr().Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.解题：本题为典型的KMP算法考察题，KMP算法描述为... 阅读全文
摘要：
Given a roman numeral, convert it to an integer.Input is guaranteed to be within the range from 1 to 3999.解题：将字符形式的罗马数字，转化为整形。输入在1~3999之间。罗马数字的书写规范，请参... 阅读全文
摘要：
Implementatoito convert a string to an integer.Hint:Carefully consider all possible input cases. If you want a challenge, please do not see below and ... 阅读全文