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LeetCode OJ - Reverse Linked List II
题目:Reverse a linked list from positionmton. Do it in-place and in one-pass.For example:Given1->2->3->4->5->NULL,m= 2 andn= 4,return1->4->3->2->5->NULL...
分类:其他好文   时间:2014-06-09 23:03:18    阅读次数:254
[leetcode]Combination Sum II @ Python
原题地址:https://oj.leetcode.com/problems/combination-sum-ii/题意:Given a collection of candidate numbers (C) and a target number (T), find all unique combi...
分类:编程语言   时间:2014-06-09 17:41:58    阅读次数:320
LeetCode: Populating Next Right Pointers in Each Node II [117]
【题目】 Follow up for problem "Populating Next Right Pointers in Each Node". What if the given tree could be any binary tree? Would your previous solution still work? Note: You may only use constant extra space. For example, Given the following binary tre...
分类:其他好文   时间:2014-06-08 15:46:22    阅读次数:303
LeetCode: Pascal's Triangle II [119]
【题目】 Given an index k, return the kth row of the Pascal's triangle. For example, given k = 3, Return [1,3,3,1]. Note: Could you optimize your algorithm to use only O(k) extra space? 【题意】 给定行索引k, k从0开始,返回该索引指向的杨辉三角的行 要求只能使用O(k)的额外空间 【思路】 ...
分类:其他好文   时间:2014-06-08 15:46:02    阅读次数:272
Unique Binary Search Trees II
题目 Given n, generate all structurally unique BST's (binary search trees) that store values 1...n. For example, Given n = 3, your program should return all 5 unique BST's shown below. ...
分类:其他好文   时间:2014-06-08 15:15:26    阅读次数:223
[LeetCode] Palindrome Partitioning II [12]
题目:For example, given s = "aab", Return 1 since the palindrome partitioning ["aa","b"] could be produced using 1 cut 解题思路:给一个字符串,如果字符串可以划分成若干子回文字符串,返回最小的划分数量。 这个题如果还用之前求所有划分组合的循环加递归方法的话,就会得到超时的错误。这是就要考虑别的方法,动态规划倒是一个不错的方法,但是动态规划最重要的是要找到动态方程。本题的动态方程: dp[i] =...
分类:其他好文   时间:2014-06-08 14:56:58    阅读次数:257
Binary Tree Level Order Traversal II
题目 Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root). For example: Given binary tree {3,9,20...
分类:其他好文   时间:2014-06-08 09:23:34    阅读次数:230
Subsets II
题目 Given a collection of integers that might contain duplicates, S, return all possible subsets. Note: Elements in a subset must be in non-descending order.The solution set must not c...
分类:其他好文   时间:2014-06-08 05:32:21    阅读次数:196
HDU1002--A + B Problem II
HDU1002--A + B Problem II...
分类:其他好文   时间:2014-06-08 04:56:06    阅读次数:242
Subsets
题目 Given a set of distinct integers, S, return all possible subsets. Note: Elements in a subset must be in non-descending order.The solution set must not contain duplicate subsets. ...
分类:其他好文   时间:2014-06-08 04:01:05    阅读次数:240
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