随笔分类 - LeetCode
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 i
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 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 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：Given an array containing n distinct numbers taken from 0, 1, 2, ..., n, find the one that is missing from the array. Note: Your algorithm should run
阅读全文
摘要：Write a program to find the n th ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 1, 2, 3, 4, 5,
阅读全文
摘要：Given a non negative integer num, repeatedly add all its digits until the result has only one digit. For example: Given num = 38, the process is like:
阅读全文
摘要：Given a binary tree, return all root to leaf paths. Note: A leaf is a node with no children. Example:
阅读全文
摘要：Given two strings s and t, write a function to determine if t is an anagram of s. For example, s = “anagram”, t = “nagaram”, return true. s = “rat”, t
阅读全文
摘要：Invert a binary tree. Trivia: This problem was inspired by this "original tweet" by "Max Howell" : Google: 90% of our engineers use the software you w
阅读全文
摘要：Given a 2D binary matrix filled with 0’s and 1’s, find the largest square containing only 1’s and return its area. For example, given the following ma
阅读全文
摘要：Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the arr
阅读全文
摘要：Reverse a singly linked list.
阅读全文
摘要：Note: This is an extension of "House Robber" . After robbing those houses on that street, the thief has found himself a new place for his thievery so
阅读全文
摘要：Write an algorithm to determine if a number is “happy”. A happy number is a number defined by the following process: Starting with any positive intege
阅读全文
摘要：You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint stopping yo
阅读全文
摘要：Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may comple
阅读全文
摘要：Related to question "Excel Sheet Column Title" Given a column title as appear in an Excel sheet, return its corresponding column number. For example:
阅读全文
摘要：Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the
阅读全文
摘要：Given a positive integer, return its corresponding column title as appear in an Excel sheet. For example:
阅读全文
浙公网安备 33010602011771号