##### 0015－3Sum
###### 📅 Sep 24, 2020· ☕ 1 min read

Given an array `nums` of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero.

Notice that the solution set must not contain duplicate triplets.

##### 0515－Find Largest Value in Each Tree Row
###### 📅 Sep 24, 2020· ☕ 1 min read

Given the `root` of a binary tree, return an array of the largest value in each row of the tree (0-indexed).

##### 0349－Intersection of Two Arrays
###### 📅 Sep 24, 2020· ☕ 1 min read

Given two arrays, write a function to compute their intersection.

##### 0175－Combine Two Tables
###### 📅 Sep 24, 2020· ☕ 1 min read

Write a SQL query for a report that provides the following information for each person in the Person table, regardless if there is an address for each of those people:

`FirstName, LastName, City, State`

##### 0029－Divide Two Integers
###### 📅 Sep 24, 2020· ☕ 1 min read

Given two integers `dividend` and `divisor`, divide two integers without using multiplication, division and mod operator.

Return the quotient after `dividing` dividend by `divisor`.

The integer division should truncate toward zero, which means losing its fractional part. For example, `truncate(8.345) = 8` and `truncate(-2.7335) = -2`.

##### 0006－Longest Substring Without Repeating Characters
###### 📅 Sep 24, 2020· ☕ 1 min read

And then read line by line: `"PAHNAPLSIIGYIR"`

Write the code that will take a string and make this conversion given a number of rows:

``````string convert(string s, int numRows);
``````

##### 0007－Reverse Integer
###### 📅 Sep 24, 2020· ☕ 1 min read

Given a 32-bit signed integer, reverse digits of an integer.

##### 0003－Longest Substring Without Repeating Characters
###### 📅 Sep 23, 2020· ☕ 1 min read

Given a string `s`, find the length of the longest substring without repeating characters.

###### 📅 Sep 22, 2020· ☕ 1 min read

You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list.

You may assume the two numbers do not contain any leading zero, except the number 0 itself.

##### 0001－Two Sum
###### 📅 Sep 21, 2020· ☕ 1 min read

Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.

You may assume that each input would have exactly one solution, and you may not use the same element twice.

You can return the answer in any order.