原创 【Leetcode Algorithm】Remove Duplicates from Sorted Array
Given a sorted array, remove the duplicates in place such that each element appear only once and return the new lengt
2018-09-03 11:22:26
3
原创 【Leetcode Algorithm】Implement strStr()
Implement strStr(). Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of
2018-09-03 11:22:26
原创 【Leetcode Algorithm】Invert Binary Tree
Invert a binary tree. 4 / \ 2 7 / \ / \ 1 3 6 9 to 4 / \ 7 2 / \ / \ 9 6 3
2018-09-03 11:22:26
原创 【Leetcode Algorithm】Valid Sudoku
Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules. The Sudoku board could be partially filled,
2018-09-03 11:22:26
原创 【Leetcode Algorithm】Remove Element
Given an array and a value, remove all instances of that value in place and return the new length. The order of eleme
2018-09-03 11:22:26
3
原创 【Leetcode Algorithm】Happy Number
Write an algorithm to determine if a number is "happy". A happy number is a number defined by the following process:
2018-09-03 11:22:14