原创 Maximal Square
Given a 2D binary matrix filled with 0's and 1's, find the largest square containing all 1's and return its area. Fo
2020-02-24 09:54:39
原创 Basic Calculator II
Implement a basic calculator to evaluate a simple expression string. The expression string contains only non-negativ
2020-02-24 09:54:39
原创 Simplify Path
Given an absolute path for a file (Unix-style), simplify it. For example,path = "/home/", => "/home"path = "/a/./b/.
2020-02-24 09:54:39
原创 Restore IP Addresses(DFS的巔峯)
Given a string containing only digits, restore it by returning all possible valid IP address combinations. For examp
2020-02-24 09:54:39
原创 Evaluate Reverse Polish Notation
Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are +, -, *, /. Each ope
2020-02-24 09:54:39
原创 Number of Digit One(數學找規律)
Given an integer n, count the total number of digit 1 appearing in all non-negative integers less than or equal to n.
2020-02-24 09:54:39
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 le
2020-02-24 09:54:39
原创 Decode ways
A message containing letters from A-Z is being encoded to numbers using the following mapping: 'A' -> 1 'B' -> 2 ...
2020-02-24 09:54:39
原创 Ugly Number II
Write a program to find the n-th ugly number. Ugly numbers are positive numbers whose prime factors only include 2,
2020-02-24 09:54:39
原创 Maximum Product Subarray
Find the contiguous subarray within an array (containing at least one number) which has the largest product. For exa
2020-02-24 09:54:39
原创 Reverse Words in a String
Given an input string, reverse the string word by word. For example, Given s = "the sky is blue", return "blue is sky
2020-02-24 09:54:39
原创 Repeated DNA Sequences
All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studyi
2020-02-24 09:54:39
原创 Basic Calculator
Implement a basic calculator to evaluate a simple expression string. The expression string may contain open ( and cl
2020-02-24 09:54:39
原创 Contains Duplicate III
Given an array of integers, find out whether there are two distinct indices i and j in the array such that the differe
2020-02-24 09:54:39
原创 Dungeon Game
https://leetcode.com/problems/dungeon-game/ public class Solution { public int calculateMinimumHP(int[][] dungeon)
2018-09-03 17:32:45