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题目：Related to question Excel Sheet Column TitleGiven a column title as appear in an Excel sheet, return its corresponding column number.For example: A -> 1 B -> 2 C -> 3 ...

题目：Given an array of integers, every element appearstwiceexcept for one. Find that single one.Note:Your algorithm should have a linear runtime complexity. Could you implement it without using e...

题目：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 stones. The one who removes the last stone will b...

题目：anysubsequence of the other strings.Asubsequenceis a sequence that can be derived from one sequence by deleting some characters without changing the order of the remaining elements. Trivially...

题目：Given a non-empty binary tree, return the average value of the nodes on each level in the form of an array.Example 1:Input: 3 / \ 9 20 / \ 15 7Output: [3, 14.5, 1...

题目：You are given two arrays(without duplicates)nums1andnums2wherenums1’s elements are subset ofnums2. Find all the next greater numbers fornums1's elements in the corresponding places ofnum...

题目：You are given a map in form of a two-dimensional integer grid where 1 represents land and 0 represents water. Grid cells are connected horizontally/vertically (not diagonally). The grid is comple...

题目：X city opened a new cinema, many people would like to go to this cinema. The cinema also gives out a poster indicating the movies’ ratings and descriptions.Please write a SQL query to output mo...

题目：Write a program that outputs the string representation of numbers from 1 ton.But for multiples of three it should output “Fizz” instead of the number and for the multiples of five output “Buzz...

题目：Write a function that takes a string as input and returns the string reversed.Example:Given s = "hello", return "olleh".代码：自己的：class Solution {public: string reverseString(string...

题目：In MATLAB, there is a very useful function called 'reshape', which can reshape a matrix into a new one with different size but keep its original data.You're given a matrix represented by a two-...

题目：Given an integer array withevenlength, where different numbers in this array represent differentkindsof candies. Each number means one candy of the corresponding kind. You need to distribute ...

题目：Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.Example 1:Input: "Let's take LeetCode cont...

题目：Given a List of words, return the words that can be typed using letters ofalphabeton only one row's of American keyboard like the image below.Example 1:Input: ["Hello", "Alaska", "Dad", ...

题目：Given a binary array, find the maximum number of consecutive 1s in this array.Example 1:Input: [1,1,0,1,1,1]Output: 3Explanation: The first two digits or the last three digits are consecut...

题目：Given a word, you need to judge whether the usage of capitals in it is right or not.We define the usage of capitals in a word to be right when one of the following cases holds:All letters in ...

题目：Given a non-empty integer array of size n, find the minimum number of moves required to make all array elements equal, where a move is incrementing n - 1 elements by 1.Example:Input:[1,2,3]...

题目：Assume you are an awesome parent and want to give your children some cookies. But, you should give each child at most one cookie. Each child i has a greed factor gi, which is the minimum size of ...

题目：Given an arbitrary ransom note string and another string containing letters from all the magazines, write a function that will return true if the ransom note can be constructed from the magazines...

题目：Related to question Excel Sheet Column TitleGiven a column title as appear in an Excel sheet, return its corresponding column number.For example:A -> 1B -> 2C -> 3 ...Z -&gt...

题目：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 represented by an array with two positive integers...

题目：or a web developer, it is very important to know how to design a web page's size. So, given a specific rectangular web page’s area, your job by now is to design a rectangular web page, whose leng...

题目：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, given nums = [0, 1, 0, 3, 12], after calling yo...

题目：Given two strings s and t which consist of only lowercase letters.String t is generated by random shuffling string s and then add one more letter at a random position.Find the letter that was...

题目：Given a binary search tree and the lowest and highest boundaries as L and R, trim the tree so that all its elements lies in [L, R] (R >= L). You might need to change the root of the tree, so t...

题目：Calculate the sum of two integersaandb, but you arenot allowedto use the operator+and-.Example:Givena= 1 andb= 2, return 3.代码：使用移位来计算，用异或求不带进位的和，用与并左移1位来算进位，然后将两者相加。class S...

题目：Given a non-negative integernum, repeatedly add all its digits until the result has only one digit.For example:Givennum = 38, the process is like:3 + 8 = 11,1 + 1 = 2. Since2has only on...

题目：Given an array of integers where 1 ≤ a[i] ≤n(n= size of array), some elements appear twice and others appear once.Find all the elements of [1,n] inclusive that do not appear in this array....

题目：Invert a binary tree. 4 / \ 2 7 / \ / \1 3 6 9to 4 / \ 7 2 / \ / \9 6 3 1代码：自己的（递归实现）：/** * Definition for a binary tree node. * str...

题目：Given a positive integer, output its complement number. The complement strategy is to flip the bits of its binary representation.　Note:The given integer is guaranteed to fit within the range ...