随笔分类 - LeetCode
摘要：Given two words word1 and word2, find the minimum number of steps required to make word1 and word2 the same, where in each step you can delete one cha
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摘要：Given n processes, each process has a unique PID (process id) and its PPID (parent process id). Each process only has one parent process, but may have
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摘要：There are n different online courses numbered from 1 to n. Each course has some duration(course length) tand closed on dth day. A course should be tak
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摘要：Given two integers n and k, find how many different arrays consist of numbers from 1 to n such that there are exactly k inverse pairs. We define an in
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摘要：Given a char array representing tasks CPU need to do. It contains capital letters A to Z where different letters represent different tasks.Tasks could
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摘要：Given an integer array, find three numbers whose product is maximum and output the maximum product. Example 1: Input: [1,2,3] Output: 6 Example 2: Inp
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摘要：Given a positive integer a, find the smallest positive integer b whose multiplication of each digit equals to a. If there is no answer or the answer i
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摘要：Given m arrays, and each array is sorted in ascending order. Now you can pick up two integers from two different arrays (each array picks one) and cal
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摘要：Given the root of a binary tree, then value v and depth d, you need to add a row of nodes with value v at the given depth d. The root node is at depth
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摘要：Given two binary trees and imagine that when you put one of them to cover the other, some nodes of the two trees are overlapped while the others are n
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摘要：Given an array consists of non-negative integers, your task is to count the number of triplets chosen from the array that can make triangles if we tak
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摘要：Given a string s and a list of strings dict, you need to add a closed pair of bold tag <b> and </b> to wrap the substrings in s that exist in dict. If
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摘要：Design and implement a data structure for a compressed string iterator. It should support the following operations: next and hasNext. The given compre
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摘要：Given a string representing a code snippet, you need to implement a tag validator to parse the code and return whether it is valid. A code snippet is
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摘要：Given a list of directory info including directory path, and all the files with contents in this directory, you need to find out all the groups of dup
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摘要：You need to construct a string consists of parenthesis and integers from a binary tree with the preorder traversing way. The null node needs to be rep
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摘要：Suppose you have a long flowerbed in which some of the plots are planted and some are not. However, flowers cannot be planted in adjacent plots - they
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摘要：Suppose Andy and Doris want to choose a restaurant for dinner, and they both have a list of favorite restaurants represented by strings. You need to h
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摘要：Given an m * n matrix M initialized with all 0's and several update operations. Operations are represented by a 2D array, and each operation is repres
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摘要：Given a positive integer n, find the number of non-negative integers less than or equal to n, whose binary representations do NOT contain consecutive
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