解开的都是套路

Thursday, December 21, 2017

Facebook脸家 - Lexicographical path

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Lexicographical path 5 / \ 3 2 / \ \ 2 4 4 \ 1 FB 面经,自底向上的 path 有【1,4,2...
Saturday, December 16, 2017

Leetcode - 214. Shortest Palindrome

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214 .  Shortest Palindrome Given a string S, you are allowed to convert it to a palindrome by adding characters in front of it. Find and r...
Friday, December 15, 2017

Leetcode - Permutation Palindrome ii (javascript)

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  267. Palindrome Permutation II Given a string  s , return all the palindromic permutations (without duplicates) of it. Return an empty ...
Sunday, July 30, 2017

Leetcode -- 105. Construct Binary Tree from Preorder and Inorder Traversal

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105. Construct Binary Tree from Preorder and Inorder Traversal Given preorder and inorder traversal of a tree, construct the binary tree. ...
Monday, May 1, 2017

Leetcode - 61. Rotate List(linkedlist)

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61. Rotate List medium https://leetcode.com/problems/rotate-list/#/submissions/1 Given a list, rotate the list to the right by   k   pla...
Thursday, April 27, 2017

Leetcode -- 547. Friend Circles(dfs)

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547. Friend Circles(dfs) medium https://leetcode.com/problems/friend-circles/#/description There are  N  students in a class. Some of t...
Wednesday, April 26, 2017

Leetcode -- 322. Coin Change(DP)

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322. Coin Change(DP) Medium https://leetcode.com/problems/coin-change/#/description You are given coins of different denominations and a...
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