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题目： Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the 阅读全文
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全排列问题总结。包含全排列递归，非递归写法，next_permutation实现原理，寻找字典序第K个全排列 阅读全文
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LeetCode每周末举办比赛，这是今天上午比赛的题解。 1. Add Strings （LeetCode 415 Easy） Given two non-negative numbers num1 and num2 represented as string, return the sum of 阅读全文
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题目： Given a sorted linked list, delete all duplicates such that each element appear only once. （Easy） For example,Given 1->1->2, return 1->2.Given 1-> 阅读全文
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题目： Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list.（Medium） For exampl 阅读全文
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题目： Follow up for "Search in Rotated Sorted Array":What if duplicates are allowed? Would this affect the run-time complexity? How and why? Write a fun 阅读全文
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题目： Follow up for "Remove Duplicates":What if duplicates are allowed at most twice? （Medium） For example,Given sorted array nums = [1,1,1,2,2,3], Your 阅读全文
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题目： Given a 2D board and a word, find if the word exists in the grid. The word can be constructed from letters of sequentially adjacent cell, where "a 阅读全文
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题目： Given a set of distinct integers, nums, return all possible subsets. Note: The solution set must not contain duplicate subsets. （Medium） For examp 阅读全文
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题目： Given two integers n and k, return all possible combinations of k numbers out of 1 ... n. （Medium） For example,If n = 4 and k = 2, a solution is: 阅读全文