01 2019 档案
摘要:You are given a string, s, and a list of words, words, that are all of the same length. Find all starting indices of substring(s) in s that is a conca
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摘要:Given two integers dividend and divisor, divide two integers without using multiplication, division and mod operator. Return the quotient after dividi
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摘要:Implement strStr(). Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. Example 1: Example 2: Cla
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摘要:Given an array nums and a value val, remove all instances of that value in-placeand return the new length. Do not allocate extra space for another arr
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摘要:Given a sorted array nums, remove the duplicates in-place such that each element appear only once and return the new length. Do not allocate extra spa
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摘要:Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. k is a positive integer and is less than or equal to
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摘要:Given a linked list, swap every two adjacent nodes and return its head. Example: Note: Your algorithm should use only constant extra space. You may no
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摘要:Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. Example: 1 struct cmp { 2 bool operator () (ListNod
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摘要:Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given n = 3, a solution set is: 1
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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. Example:
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摘要:Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: No
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摘要:Given a linked list, remove the n-th node from the end of list and return its head. Example: Note: Given n will always be valid. Follow up: Could you
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摘要:Given an array nums of n integers and an integer target, are there elements a, b, c, and d in nums such that a + b + c + d = target? Find all unique q
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摘要:Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A mapping of digit to le
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摘要:Given an array nums of n integers and an integer target, find three integers in nums such that the sum is closest to target. Return the sum of the thr
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摘要:Given an array nums of n integers, are there elements a, b, c in nums such that a+ b + c = 0? Find all unique triplets in the array which gives the su
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摘要:Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an empty string "". Exampl
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摘要:Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. For example, two is written as II in Roman numeral, just two one's
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摘要:Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. For example, two is written as II in Roman numeral, just two one's
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摘要:Given n non-negative integers a1, a2, ..., an , where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endp
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摘要:Given an input string (s) and a pattern (p), implement regular expression matching with support for '.' and '*'. The matching should cover the entire
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摘要:Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1: Example 2: Example 3:
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摘要:Implement atoi which converts a string to an integer. The function first discards as many whitespace characters as necessary until the first non-white
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摘要:Problem A. Mushroom Monster Problem Kaylin loves mushrooms. Put them on her plate and she'll eat them up! In this problem she's eating a plate of mush
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摘要:Problem A. Standing Ovation Problem It's opening night at the opera, and your friend is the prima donna (the lead female singer). You will not be in t
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摘要:现在才推这游戏,反省一下orz 玩了2才发现狛枝的魅力啊!!绪方的声音太过好听了,在通1的时候就超喜欢苗木的声音 果然弹丸的人设实在是质量太高了,突然想起自己的psp的我已经完全沉迷了 转载请注明作者和出处 by@洛天之痕 写在前面: 虽然弹丸2感觉还是自己打通的比较有成就感啦,但苦逼的撸主在打完一
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摘要:Easy Given a 32-bit signed integer, reverse digits of an integer. Example 1: Example 2: Example 3: Note:Assume we are dealing with an environment whic
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摘要:Medium The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixe
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摘要:Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. Example 1: Example 2: 1 class Solu
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摘要:There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity sh
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摘要:Given a string, find the length of the longest substring without repeating characters. Example 1: Input: "abcabcbb" Output: 3 Explanation: The answer
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摘要:You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contai
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摘要:Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have ex
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摘要:Description For the daily milking, Farmer John's N cows (1 ≤ N ≤ 50,000) always line up in the same order. One day Farmer John decides to organize a g
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