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Results tagged with programming-challenge
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user 142974
Use this tag when the code is a solution to a programming challenge. Always include a sufficient description of the problem to be solved - while a link to the challenge is welcome, the review request needs to be complete when the challenge site is unavailable.
10
votes
2
answers
4k
views
Generate all valid combinations of n pair of parentheses
Implement an algorithm to print all valid (e.g. properly opened and
closed) combinations of n pair of parentheses.
Following is my implementation and I think it works. Is the algorithm efficien …
- 539
12
votes
3
answers
2k
views
Given some integers, return the k most frequent elements
Given a non-empty array of integers, return the k most frequent elements.
For example, given [1,1,1,2,2,3] and k = 2, return [1,2].
Following is my submission to this problem on Leetcode and it is a …
- 539
2
votes
1
answer
2k
views
Given a binary tree, find the maximum path sum
This is a leetcode.com problem.
For this problem, a path is defined as any sequence of nodes from some
starting node to any node in the tree along the parent-child
connections. The path must …
- 539
2
votes
1
answer
950
views
Merge K Sorted List
Merge k sorted linked lists and return it as one sorted list. The definition of the ListNode class and the signature of the MergeKLists method can't be modified.
Below is my submission to LeetCod …
- 539
5
votes
1
answer
595
views
Compute all valid configuration of eight queens on a 8x8 chess board
Write an algorithm to print all valid ways of arranging eight queens
on an 8x8 chess board so that none of them attack any other.
Following is my code for this. Do you see any performance or co …
- 539
2
votes
2
answers
1k
views
Count of Smaller Numbers After Self
This is a LeetCode.com problem.
https://leetcode.com/problems/count-of-smaller-numbers-after-self/description/
You are given an integer array nums and you have to return a new
counts array. The …
- 539
4
votes
2
answers
1k
views
Given two words and a dictionary's word list, find all shortest transformation sequence
This is a leetcode problem (https://leetcode.com/problems/word-ladder-ii/description/)
Given two words (beginWord and endWord), and a dictionary's word list, find all shortest transformation sequence …
- 539
4
votes
1
answer
5k
views
Compute power set of a given set in Python
Problem:
Given a set (let's say of integers), return the list of all of its subsets also known as the power set.
It looks to be working, but I would like feedback on the algorithm and Python cod …
- 539
1
vote
1
answer
838
views
Compute the number of ways a given amount (cents) can be changed
Given an infinite number of different coin types (such as pennies,
nickels, dimes, quarters) find out how many ways n cents can be
represented.
My code appears to work (although I am curious …
- 539
1
vote
Generate all permutations of a list in Python
The algorithm as you have intended looks ok to me.
However I have a few comments about the algorithm's efficiency. With the current approach you will regenerate the same permutation many times if th …
- 539