随笔分类 -  leetcode

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LeetCode Minimum Path Sum
摘要：Given amxngrid filled with non-negative numbers, find a path from top left to bottom right whichminimizesthe sum of all numbers along its path.Note:Yo... 阅读全文
posted @ 2014-10-18 19:23 birdhack 阅读(115) 评论(0) 推荐(0)
LeetCode Permutations
摘要：Given a collection of numbers, return all possible permutations.For example,[1,2,3]have the following permutations:[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,... 阅读全文
posted @ 2014-10-17 23:24 birdhack 阅读(109) 评论(0) 推荐(0)
LeetCode Find Minimum in Rotated Sorted Array
摘要：Suppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e.,0 1 2 4 5 6 7might become4 5 6 7 0 1 2).Find the minimum element.You m... 阅读全文
posted @ 2014-10-17 21:26 birdhack 阅读(91) 评论(0) 推荐(0)
LeetCode Search a 2D Matrix
摘要：Write an efficient algorithm that searches for a value in anmxnmatrix. This matrix has the following properties:Integers in each row are sorted from l... 阅读全文
posted @ 2014-10-16 11:28 birdhack 阅读(111) 评论(0) 推荐(0)
LeetCode Container With Most Water
摘要：Givennnon-negative integersa1,a2, ...,an, where each represents a point at coordinate (i,ai).nvertical lines are drawn such that the two endpoints of ... 阅读全文
posted @ 2014-10-16 10:53 birdhack 阅读(147) 评论(0) 推荐(0)
LeetCode Generate Parentheses
摘要：Givennpairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, givenn= 3, a solution set is:"((()))... 阅读全文
posted @ 2014-10-15 22:43 birdhack 阅读(153) 评论(0) 推荐(0)
LeetCode Unique Paths
摘要：A robot is located at the top-left corner of amxngrid (marked 'Start' in the diagram below).The robot can only move either down or right at any point ... 阅读全文
posted @ 2014-10-15 00:06 birdhack 阅读(128) 评论(0) 推荐(0)
LeetCode Pascal's Triangle
摘要：GivennumRows, generate the firstnumRowsof Pascal's triangle.For example, givennumRows= 5,Return[ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1]... 阅读全文
posted @ 2014-10-12 15:27 birdhack 阅读(162) 评论(0) 推荐(0)
LeetCode Plus One
摘要：Given a non-negative number represented as an array of digits, plus one to the number.The digits are stored such that the most significant digit is at... 阅读全文
posted @ 2014-10-12 10:48 birdhack 阅读(131) 评论(0) 推荐(0)
LeetCode Gray Code
摘要：The gray code is a binary numeral system where two successive values differ in only one bit.Given a non-negative integernrepresenting the total number... 阅读全文
posted @ 2014-10-08 23:55 birdhack 阅读(120) 评论(0) 推荐(0)
LeetCode Sort Colors
摘要：Given an array withnobjects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, ... 阅读全文
posted @ 2014-10-06 11:59 birdhack 阅读(125) 评论(0) 推荐(0)
LeetCode Merge Sorted Array
摘要：Given two sorted integer arrays A and B, merge B into A as one sorted array.Note:You may assume that A has enough space (size that is greater or equal... 阅读全文
posted @ 2014-10-06 10:51 birdhack 阅读(127) 评论(0) 推荐(0)
LeetCode Symmetric Tree
摘要：Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center).For example, this binary tree is symmetric: 1 / \ ... 阅读全文
posted @ 2014-10-02 08:24 birdhack 阅读(143) 评论(0) 推荐(0)
LeetCode Swap Nodes in Pairs
摘要：Given a linked list, swap every two adjacent nodes and return its head.For example,Given1->2->3->4, you should return the list as2->1->4->3.Your algor... 阅读全文
posted @ 2014-09-29 22:08 birdhack 阅读(129) 评论(0) 推荐(0)
leetcode Remove Duplicates from Sorted Array
摘要：Given a sorted array, remove the duplicates in place such that each element appear onlyonceand return the new length.Do not allocate extra space for a... 阅读全文
posted @ 2014-09-26 14:05 birdhack 阅读(148) 评论(0) 推荐(0)
leetcode Convert Sorted Array to Binary Search Tree
摘要：Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 1 /** 2 * Definition for binary tree 3 * public cl... 阅读全文
posted @ 2014-09-26 11:28 birdhack 阅读(144) 评论(0) 推荐(0)
leetcode Balanced Binary Tree
摘要：Given a binary tree, determine if it is height-balanced.For this problem, a height-balanced binary tree is defined as a binary tree in which the depth... 阅读全文
posted @ 2014-09-26 10:42 birdhack 阅读(115) 评论(0) 推荐(0)
Merge Two Sorted Lists
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. 1 /** 2 ... 阅读全文
posted @ 2014-09-25 11:11 birdhack 阅读(155) 评论(0) 推荐(0)
LeetCode Remove Element
摘要：Given an array and a value, remove all instances of that value in place and return the new length.The order of elements can be changed. It doesn't mat... 阅读全文
posted @ 2014-09-25 10:41 birdhack 阅读(94) 评论(0) 推荐(0)
LeetCode Maximum Subarray
摘要：Find the contiguous subarray within an array (containing at least one number) which has the largest sum.For example, given the array[−2,1,−3,4,−1,2,1,... 阅读全文
posted @ 2014-09-25 10:01 birdhack 阅读(117) 评论(0) 推荐(0)

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