随笔分类 - algorithm
摘要：Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assum
阅读全文
摘要：The thief has found himself a new place for his thievery again. There is only one entrance to this area, called the "root." Besides the root, each hou
阅读全文
摘要：Given an unsorted array return whether an increasing subsequence of length 3 exists or not in the array. Formally the function should: Your algorithm
阅读全文
摘要：Given a list of airline tickets represented by pairs of departure and arrival airports [from, to], reconstruct the itinerary in order. All of the tick
阅读全文
摘要：One way to serialize a binary tree is to use pre-order traversal. When we encounter a non-null node, we record the node's value. If it is a null node,
阅读全文
摘要：Given a sorted positive integer array nums and an integer n, add/patch elements to the array such that any number in range [1, n]inclusive can be form
阅读全文
摘要：Given an unsorted array nums, reorder it such that nums[0] < nums[1] > nums[2] < nums[3].... Example:(1) Given nums = [1, 5, 1, 1, 6, 4], one possible
阅读全文
摘要：Given two arrays of length m and n with digits 0-9 representing two numbers. Create the maximum number of length k <= m + nfrom digits of the two. The
阅读全文
摘要：Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your
阅读全文
摘要：You are given an integer array nums and you have to return a new counts array. The counts array has the property where counts[i] is the number of smal
阅读全文
摘要：Write a program to find the nth super ugly number. Super ugly numbers are positive numbers whose all prime factors are in the given prime list primes
阅读全文
摘要：For a undirected graph with tree characteristics, we can choose any node as the root. The result graph is then a rooted tree. Among all possible roote
阅读全文
摘要：Given an unsorted array of integers, find the length of longest increasing subsequence. For example,Given [10, 9, 2, 5, 3, 7, 101, 18],The longest inc
阅读全文
摘要：Serialization is the process of converting a data structure or object into a sequence of bits so that it can be stored in a file or memory buffer, or
阅读全文
摘要：You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to remove 1 to 3 ston
阅读全文
摘要：Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, such that there is a bijection between a lette
阅读全文
摘要：Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements. For example, giv
阅读全文
摘要：Given a string that contains only digits 0-9 and a target value, return all possibilities to add binary operators (not unary) +, -, or *between the di
阅读全文
摘要：Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ...) which sum to n. For example, given n = 12,
阅读全文
摘要：You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality c
阅读全文
浙公网安备 33010602011771号