随笔分类 - LeetCode
摘要：Max Number of K-Sum Pairs (M) 题目 You are given an integer array nums and an integer k. In one operation, you can pick two numbers from the array whose
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摘要：Kth Largest Element in an Array (M) 题目 Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order,
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摘要：Get Maximum in Generated Array (E) 题目 You are given an integer n. An array nums of length n + 1 is generated in the following way: nums[0] = 0 nums[1]
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摘要：Minimum Operations to Reduce X to Zero (M) 题目 You are given an integer array nums and an integer x. In one operation, you can either remove the leftmo
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摘要：Boats to Save People (M) 题目 The i-th person has weight people[i], and each boat can carry a maximum weight of limit. Each boat carries at most 2 peopl
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摘要：Merge Sorted Array (E) 题目 Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array. Note: The number of elements in
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摘要：Create Sorted Array through Instructions (H) 题目 Given an integer array instructions, you are asked to create a sorted array from the elements in instr
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摘要：Word Ladder (H) 题目 Given two words beginWord and endWord, and a dictionary wordList, return the length of the shortest transformation sequence from be
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摘要：Check If Two String Arrays are Equivalent (E) 题目 Given two string arrays word1 and word2, return true if the two arrays represent the same string, and
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摘要：Kth Missing Positive Number (E) 题目 Given an array arr of positive integers sorted in a strictly increasing order, and an integer k. Find the kth posit
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摘要：Remove Duplicates from Sorted List II (M) 题目 Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers f
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摘要：Beautiful Arrangement (M) 题目 Suppose you have n integers from 1 to n. We define a beautiful arrangement as an array that is constructed by these n num
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摘要：Find a Corresponding Node of a Binary Tree in a Clone of That Tree (M) 题目 Given two binary trees original and cloned and given a reference to a node t
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摘要：Check Array Formation Through Concatenation (E) 题目 You are given an array of distinct integers arr and an array of integer arrays pieces, where the in
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摘要：Largest Rectangle in Histogram (H) 题目 Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the
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摘要：Pseudo-Palindromic Paths in a Binary Tree (M) 题目 Given a binary tree where node values are digits from 1 to 9. A path in the binary tree is said to be
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摘要：Reach a Number (M) 题目 You are standing at position 0 on an infinite number line. There is a goal at position target. On each move, you can either go l
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摘要：Jump Game IV (H) 题目 Given an array of integers arr, you are initially positioned at the first index of the array. In one step you can jump from index
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摘要：Decode Ways (M) 题目 A message containing letters from A-Z is being encoded to numbers using the following mapping: 'A' -> 1 'B' -> 2 ... 'Z' -> 26 Give
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摘要：Diagonal Traverse (M) 题目 Given a matrix of M x N elements (M rows, N columns), return all elements of the matrix in diagonal order as shown in the bel
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