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全部文章 / LeetCode （共47篇）

leetcode39. Combination Sum【回溯】

https://leetcode.com/problems/combination-sum/description/ Given a set of candidate numbers (candidates) (without duplicates) and a target number (ta...

leetcode 回溯

2018-10-16

0 518

LeetCode 36. Valid Sudoku【九宫格判断合法】

Determine if a 9x9 Sudoku board is valid. Only the filled cells need to be validated according to the following rules: Each row must contain the di...

2018-10-15

0 683

leetcode33. Search in Rotated Sorted Array【旋转数组找指定值二分】

Suppose an array sorted in ascending order is rotated at some pivot unknown to you beforehand. (i.e., [0,1,2,4,5,6,7] might become [4,5,6,7,0,1,2]). ...

leetcode 二分

2018-10-12

0 700

leetcode 29. Divide Two Integers【二进制】不用除法做整除

Given two integers dividend and divisor, divide two integers without using multiplication, division and mod operator. Return the quotient after divid...

2018-10-10

0 542

leetcode24. Swap Nodes in Pairs【Python刷题】链表交换相邻位置

Given a linked list, swap every two adjacent nodes and return its head. Example: Given 1->2->3->4, you should return the list as 2->1-&...

2018-10-08

0 503

leetcode 22. Generate Parentheses

22. Generate Parentheses DescriptionHintsSubmissionsDiscussSolution Pick One Given n pairs of parentheses, write a function to generate all com...

leetcode

2018-09-28

0 803

leetcode 19. Remove Nth Node From End of List【Python刷题】

Given a linked list, remove the n-th node from the end of list and return its head. Example: Given linked list: 1->2->3->4->5, and n = ...

leetcode

2018-09-27

0 518

leetcode17Letter Combinations of a Phone Number【队列】

Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A mapping of digit to l...

leetcode 队列

2018-09-12

0 516

leetcode 16 3Sum Closest【双指针变形】

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...

leetcode

2018-09-05

0 532

leetcode 15 3-sum【双指针】

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 s...

2018-08-01

0 536