原创 Divide Two Integers
Divide two integers without using multiplication, division and mod operator. The idea is to use bit operations. The key
2019-02-22 20:47:33
原创 Minimum Path Sum
Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum o
2019-02-22 20:47:16
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原创 Trapping Rain Water
Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it
2019-02-22 20:47:16
原创 Spiral Matrix
Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order.For example,Give
2019-02-22 20:47:14
原创 Palindrome Partitioning
Given a string s, partition s such that every substring of the partition is a palindrome.Return all possible palindrome
2019-02-22 20:47:14
原创 Populating Next Right Pointers in Each Node II
Follow up for problem "Populating Next Right Pointers in Each Node".What if the given tree could be any binary tree? Wou
2019-02-22 20:47:14
原创 Jump Game II
Given an array of non-negative integers, you are initially positioned at the first index of the array.Each element in t
2019-02-22 20:47:14
原创 Validate Binary Search Tree
Given a binary tree, determine if it is a valid binary search tree (BST).Assume a BST is defined as follows: The lef
2019-02-22 20:47:14
原创 Search in Rotated Sorted Array
Suppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1
2019-02-22 20:47:05
原创 Merge Sorted Array
Given two sorted integer arrays A and B, merge B into A as one sorted array.Note:You may assume that A has enough space
2019-02-22 20:47:03
原创 Unique Paths
A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below).The robot can only move
2019-02-22 20:47:02
原创 Gas Station
There are N gas stations along a circular route, where the amount of gas at station i is gas[i].You have a car with an u
2019-02-22 20:47:02
原创 Permutations
Given a collection of numbers, return all possible permutations.For example,[1,2,3] have the following permutations:[1,
2019-02-22 20:47:02
原创 Insertion Sort List
Sort a linked list using insertion sort.把插入排序應用在linkedlist上面，做一點小小的變動，之前查找到需要改變位置的元素的時候從後往前一步一步挪，因爲是singlelinkedlist，則需要
2019-02-22 20:47:02