##### 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.