All Questions
49 questions
5
votes
1
answer
112
views
How to merge two descending singly linkedlist into one ascending linkedlist using Recursion without any helper method?
Here is my solution:
I want to know if my solution fits the requirement 100%? Or if there is any better solution?
Constraint of the question:
must be singly linkedlist
must use recursion, and no ...
- 53
4
votes
1
answer
305
views
Minimax based Tic Tac Toe
I am attempting to make an unbeatable Tic Tac Toe game using a simplified minimax algorithm. The code looks like this:
...
- 361
5
votes
2
answers
520
views
How to optimize Karatsuba algorithm (using arraylist and java)
I was using Karatsuba algorithm to multiply two polynomials and return the coefficients and I am using java, we are asked to use arraylists here, however, my code is too complicated and it takes much ...
- 51
2
votes
0
answers
93
views
Kadanes algorithm implementation
I just wanted to ask the following question. I have solved Kadanes algorithm using the recursive approach as shown below. The implementation works
...
- 121
5
votes
0
answers
1k
views
Mahjong hand completeness checking algorithm
As a summer project, I have been working on a small-scale, console-based version of Mahjong (the Rummy-like hand completion game, and not the solitaire version). While having prior knowledge of the ...
- 51
9
votes
4
answers
3k
views
"What is the maximum that Player 1 can win?"
This is a question that I encountered in one of the competitive coding tests. The question goes as follows:
A 2-player game is being played. There is a single pile of stones. Every stone has an ...
- 275
5
votes
2
answers
318
views
Three stage Sudoku puzzle generator
This was my first time attempting a project like this, so I figured it would improve readability, and would also just be nice If I allowed each stage to be visualized.
Also, this only generates them, ...
- 171
3
votes
2
answers
1k
views
Counting the number of ways to decode a string
I am working on problem where I need to decode a string:
A message containing letters from A-Z is being encoded to numbers
using the following mapping:
'A' -> 1
'B' -> 2
...
'...
- 499
3
votes
2
answers
593
views
Find the longest sub string of a word after concatenation of given words array
An Array of N words is given. Each word consists of small letters ('a'-'z'). Our goal is to concatenate the words in such a way as to obtain a single word with longest possible substring composed of ...
- 31
3
votes
1
answer
684
views
Speed up Magic square program
I have written a Java program to calculate magic squares with recursion and backtracking. A 3*3 Magic square is calculated in about 1 sec, but a 4*4 needs about 50 minutes on my laptop with Intel i5. ...
- 605
3
votes
1
answer
676
views
Checking whether given array is sorted by divide-and-conquer
I've written a code that I try to use divide and conquer approach to determine if the given array is sorted. I wonder whether I apply the approach accurately.
...
1
vote
2
answers
772
views
Find all root to leaf paths in binary tree
Description:
Given a binary tree, return all root-to-leaf paths.
Leetcode
...
- 5,177
2
votes
1
answer
524
views
Find minimum depth in a binary tree
Description:
Given a binary tree, find its minimum depth.
The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node.
Note: A leaf is a node ...
- 5,177
0
votes
2
answers
373
views
Binary search for integers
I've written binary search with only my own efforts 💪💪 without glancing at anywhere. I stuck on finding base case. At final, I think that if last checking is less than first index or first checking ...
1
vote
1
answer
500
views
Reinterpreting a string, treating < as a backspace character
I've come up with a solution to this coding challenge using recursion. In summary, the input is a string where the < symbol represents a backspace (up to 1 ...
- 369