All Questions
34 questions
6votes
4answers
3kviews
Find all letter Combinations of a Phone Number
The task is taken from LeetCode Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A mapping of digit to letters (just ...
- 3,981
2votes
1answer
757views
Given time intervals determine if a person could attend all meetings
The task is taken from LeetCode Given an array of meeting time intervals consisting of start and end times [[s1,e1],[s2,e2],...] ...
- 3,981
1vote
1answer
291views
Merge k Sorted Lists
The task is taken from LeetCode Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. Example: ...
- 3,981
8votes
1answer
2kviews
Merge Intervals in JavaScript
This is a task taken from Leetcode - Given a collection of intervals, merge all overlapping intervals. Example 1: ...
- 3,981
2votes
1answer
2kviews
Find common characters (LeetCode)
The task is taken from leetcode Given an array A of strings made only from lowercase letters, return a list of all characters that show up in all strings within the list (including duplicates). ...
- 3,981
3votes
2answers
898views
Robot Return to Origin
The task is taken from leetcode There is a robot starting at position (0, 0), the origin, on a 2D plane. Given a sequence of its moves, judge if this robot ends up at (0, 0) after it completes ...
- 3,981
1vote
2answers
118views
Flipping an Image
The task is taken from leetcode Given a binary matrix A, we want to flip the image horizontally, then invert it, and return the resulting image. To flip an ...
- 3,981
1vote
1answer
530views
Sort Array By Parity
The task is taken from leetcode Given an array A of non-negative integers, return an array consisting of all the even elements of A, followed by all the odd elements of A. You may return any ...
- 3,981
0votes
1answer
52views
Items also occurs in a set
The task You're given strings J representing the types of stones that are jewels, and S representing the stones you have. Each character in S is a type of stone you have. You want to know how ...
- 3,981
2votes
0answers
733views
Determine whether there exists a one-to-one character mapping from one string to another
The task Determine whether there exists a one-to-one character mapping from one string s1 to another s2. For example, given s1 = abc and s2 = bcd, return true since we can map a to b, b to c, and c ...
- 3,981
1vote
2answers
1kviews
Sum of two numbers in array
The task You are given two non-empty arrays representing two non-negative integers. The digits are stored in reverse order and each of their items contain a single digit. Add the two numbers and ...
- 3,981
1vote
1answer
1kviews
Find busiest period in building
The task You are given a list of data entries that represent entries and exits of groups of people into a building. An entry looks like this: {"timestamp": 1526579928, count: 3, "type": "...
- 3,981
0votes
1answer
867views
Find indices of two numbers such that they add up to a target
The task ...is taken from leetcode Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly ...
- 3,981
2votes
1answer
292views
Find all pairs of unique indices in a list such that the concatenation of the two words is a palindrome
The task Given a list of words, find all pairs of unique indices such that the concatenation of the two words is a palindrome. For example, given the list ...
- 3,981
1vote
1answer
558views
Rotate a N by N matrix by 90 degrees clockwise
The task: Given an N by N matrix, rotate it by 90 degrees clockwise. For example, given the following matrix: [[1, 2, 3], [4, 5, 6], [7, 8, 9]] you should return: [[7, 4, 1], [8, 5,...
- 3,981
