Given a string, find the length of the longest substring without repeating characters.E...
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3. Longest Substring Without Repeating Characters 不含重復(fù)字母的最長(zhǎng)子串
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2. Add Two Numbers 鏈表表示的兩數(shù)求和
You are given two linked lists representing two non-negative numbers. The digits are st...
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1. Two Sum兩數(shù)之和
Given an array of integers, return indices of the two numbers such that they add up to ...
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349. Intersection of Two Arrays 數(shù)組交集
Given two arrays, write a function to compute their intersection.Example:Given nums1 = ...
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350. Intersection of Two Arrays II 數(shù)組交集2
Given two arrays, write a function to compute their intersection.Example:Given nums1 = ...
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357. Count Numbers with Unique Digits 統(tǒng)計(jì)各位不同的數(shù)字個(gè)數(shù)
Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < ...
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367. Valid Perfect Square 平方數(shù)
Given a positive integer num, write a function which returns True if num is a perfect s...
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371. Sum of Two Integers 兩數(shù)求和
Calculate the sum of two integers a and b, but you are not allowed to use the operator ...
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374. Guess Number Higher or Lower猜數(shù)大小
We are playing the Guess Game. The game is as follows:I pick a number from 1 to n. You ...
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380. Insert Delete GetRandom O(1) O(1)時(shí)間的插入、刪除和隨機(jī)取元素
Design a data structure that supports all following operations in average O(1) time. in...
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382. Linked List Random Node 鏈表的隨機(jī)結(jié)點(diǎn) 【蓄水池抽樣】
Given a singly linked list, return a random node's value from the linked list. Each nod...
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387. First Unique Character in a String 字符串中的首個(gè)單獨(dú)字母
Given a string, find the first non-repeating character in it and return it's index. If ...
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389. Find the Difference 找不同
Given two strings s and t which consist of only lowercase letters.String t is generated...
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392. Is Subsequence 判斷子序列
Given a string s and a string t, check if s is subsequence of t.You may assume that the...
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396. Rotate Function 輪轉(zhuǎn)函數(shù)
Given an array of integers A and let n to be its length.Assume Bk to be an array obtain...
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397. Integer Replacement 整數(shù)替換
Given a positive integer n and you can do operations as follow: What is the minimum num...
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404. Sum of Left Leaves 左葉子的和
Find the sum of all left leaves in a given binary tree.對(duì)給定的二叉樹，返回其左葉子的和。Example: There ...
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409. Longest Palindrome 最長(zhǎng)回文組合
Given a string which consists of lowercase or uppercase letters, find the length of the...
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412. Fizz Buzz 菲茲布茲
Write a program that outputs the string representation of numbers from 1 to n.But for m...
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414. Third Maximum Number 第三大元素
Given a non-empty array of integers, return the third maximum number in this array. If ...