All Questions
65 questions
4
votes
1
answer
1k
views
Leetcode three sum in Javascript
I was doing 3sum question on leetcode
Question
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 ...
- 495
5
votes
2
answers
520
views
Frequency Queries (Hackerrank)
This is the problem:
You are given queries. Each query is of the form two integers described below:
1 x: Insert x in your data structure.
2 y: Delete one occurrence of y from your data ...
- 151
5
votes
2
answers
2k
views
Process strings of operations
This was the task (I don't know the exact wordings anymore):
You get a string with operation as input:
if it is a number push it to stack
if it is "DUP", then duplicate the one one top and ...
- 3,981
8
votes
5
answers
1k
views
Expanding powers of expressions of the form ax+b
I solved the following problem:
Write a function expand that takes in an expression with a single, one character variable, and expands it. The expression is in the form ...
- 111
3
votes
1
answer
1k
views
Shortest way to form a string out of a subsequence of a string
The task is taken from LeetCode (subscription required) -
From any string, we can form a subsequence of that string by deleting
some number of characters (possibly no deletions).
Given two strings ...
- 3,981
6
votes
4
answers
3k
views
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
2
votes
1
answer
758
views
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
5
votes
1
answer
8k
views
Merge Two Sorted Lists in JavaScript
The task is taken from LeetCode
Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two
lists.
Example 1:
...
- 3,981
8
votes
1
answer
2k
views
Merge Intervals in JavaScript
This is a task taken from Leetcode -
Given a collection of intervals, merge all overlapping intervals.
Example 1:
...
- 3,981
1
vote
3
answers
545
views
Jewels and Stones
The task
is taken from leetcode
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....
- 3,981
5
votes
1
answer
323
views
Find the starting indices of all occurrences of the pattern in the string - KMP algorithm follow-up
The task
was initially solved here, but was too buggy:
Given a string and a pattern, find the starting indices of all
occurrences of the pattern in the string. For example, given the
string "...
- 3,981
2
votes
1
answer
266
views
Number of Islands
The task
is taken from leetcode
Given a 2d grid map of '1's (land) and '0's (water), count the number
of islands. An island is surrounded by water and is formed by
connecting adjacent lands ...
- 3,981
2
votes
1
answer
477
views
Length of the longest consecutive run of 1s in its binary representation
The task
Given an integer n, return the length of the longest consecutive run
of 1s in its binary representation.
For example, given 156, you should return 3
My function solution 1
Style 1
<...
- 3,981
3
votes
1
answer
633
views
Longest Consecutive Sequence
This task is taken from Leetcode -
Given an unsorted array of integers, find the length of the longest
consecutive elements sequence.
Your algorithm should run in \$O(n)\$ complexity.
...
- 3,981
1
vote
1
answer
138
views
Daily Temperatures
The task
is taken from leetcode
Given a list of daily temperatures T, return a list such that, for
each day in the input, tells you how many days you would have to wait
until a warmer ...
- 3,981