原创 Divide Two Integers

一. Divide Two Integers Divide two integers without using multiplication, division and mod operator. If it is overfl

2020-02-23 18:17:31

原创 Trapping Rain Water

一. Trapping Rain Water Given n non-negative integers representing an elevation map where the width of each bar is 1

2020-02-23 18:17:31

原创 Reverse Nodes in k-Group

一. Reverse Nodes in k-Group Given a linked list, reverse the nodes of a linked list k at a time and return its modi

2020-02-23 18:17:31

原创 Longest Valid Parentheses

一. Longest Valid Parentheses Given a string containing just the characters ‘(’ and ‘)’, find the length of the long

2020-02-23 18:17:31

原创 Merge k Sorted Lists

一. Merge k Sorted Lists Merge k sorted linked lists and return it as one sorted list. Analyze and describe its comp

2020-02-23 18:17:31

原创 Multiply Strings

一. Multiply Strings Given two non-negative integers num1 and num2 represented as strings, return the product of num

2020-02-23 18:17:31

原创 String to Integer (atoi)

一. String to Integer (atoi) Implement atoi to convert a string to an integer. Hint: Carefully consider all possible

2020-02-23 18:17:31

原创 Arithmetic Slices II - Subsequence

一. Arithmetic Slices II - Subsequence A sequence of numbers is called arithmetic if it consists of at least three e

2020-02-23 18:17:31

原创 Regular Expression Matching

一. Regular Expression Matching Implement regular expression matching with support for ‘.’ and ‘*’. ‘.’ Matches any

2020-02-23 18:17:31

原创 Wildcard Matching

一. Wildcard Matching Implement wildcard pattern matching with support for ‘?’ and ‘*’. ‘?’ Matches any single chara

2020-02-23 18:17:31

原创 Sudoku Solver

一. Sudoku Solver Write a program to solve a Sudoku puzzle by filling the empty cells. Empty cells are indicated by

2020-02-23 18:17:31

原创 First Missing Positive

一. First Missing Positive Given an unsorted integer array, find the first missing positive integer. For example, G

2020-02-23 18:17:31

原创 Container With Most Water

一. Container With Most Water Given n non-negative integers a1 , a2 , …, an , where each represents a point at coord

2020-02-23 18:17:31

原创 4Sum

一. 4Sum Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Fi

2020-02-23 18:17:31

原创 3Sum Closest

一. 3Sum Closest Given an array S of n integers, find three integers in S such that the sum is closest to a given nu

2020-02-23 18:17:31