All Questions
134 questions
3votes
1answer
237views
Leetcode: Number of Islands - BFS (Queue vs Recursion)
I was playing around with leetcode's Number of Islands. As per the challenge's description: Given an m x n 2D binary grid grid which represents a map of '1's (land) and '0's (water), return the ...
- 361
6votes
3answers
465views
Leetcode: Largest Number
I was trying out leetcode's Largest Number. As per the challenge's description: Given a list of non-negative integers nums, arrange them such that they form the largest number and return it. Since ...
- 361
4votes
2answers
513views
Leetcode: Steps to Make Array Non-decreasing
I was trying out leetcode's Steps to Make Array Non-decreasing As per the challenge's description: You are given a 0-indexed integer array nums. In one step, remove all elements nums[i] where nums[i ...
- 361
9votes
4answers
2kviews
Leetcode : First Missing Positive
I was trying out leetcode's first missing positive. As per the challenge's description: Given an unsorted integer array nums, return the smallest missing positive integer. You must implement an ...
- 361
2votes
3answers
553views
Recursive palindrome check
I'm trying to solve this which basically calls for a recursive palindrome check with some minor extra steps (Special characters and whitespace can be ignored). The test inputs' length can be 100000 ...
1vote
2answers
155views
Improving Project Euler code problem #10
So, I just finished Problem 10 on Project Euler, but it took about 3 to 4 minutes for my output to come out, due to bad coding, I guess, any suggestions on how could I optimize my code? Question The ...
1vote
2answers
646views
Leetcode kth largest element without using heaps
I was working on kth largest element problem on leetcode Question Given an integer array nums and an integer k, return the kth largest element in the array. Note that it is the kth largest element in ...
- 189
2votes
1answer
70views
Molybdenum2019 challenge efficient implementation
I'm working on a solution that is correct but inefficient. https://app.codility.com/programmers/task/leader_slice_inc/ This is my code : ...
1vote
1answer
90views
return the number of times is state of bulb changed?
Today in an exam I faced a problem which is Toggled Switches(Hacker Earth) as it is an exam question So, I am unable to send the question or its link (exactly). Problem: we have to print a number ...
1vote
1answer
1kviews
Follow-up: How can we optimizing Java BigInteger operations?
This is the follow up question of How can we optimizing Java BigInteger operations? Problem Reduce the number to 1 in a minimal number of steps, following the rules: ...
4votes
1answer
166views
Find first index of 1
Given a sorted array consisting 0’s and 1’s. The task is to find the index of first ‘1’ in the given array. I submitted the below code in geeks for geeks and the execution time is 5.77. Need help in ...
- 85
3votes
0answers
198views
Count unique subsequences
I came across this question in a coding competition (Java-restricted) and I got a time-length-exceeded. I am unable to provide a link as the contest is closed now. Can I know how can I optimise this? ...
3votes
1answer
280views
LeetCode 146: LRU Cache III
I'm posting my Java code for LeetCode's LRU Cache. If you have time and would like to review, please do so. Thank you! Problem Design and implement a data structure for Least Recently Used (LRU) cache....
- 3,592
2votes
0answers
810views
LeetCode 218: The Skyline Problem II
Here I'm posting my Java code for the skyline problem. If you have time and would like to review, please do so, I'd appreciate that. Problem A city's skyline is the outer contour of the silhouette ...
- 3,592
3votes
1answer
471views
LeetCode 767: Reorganize String
Here I'm posting my code for the Reorganize String problem on LeetCode. If you have time and would like to review, please do so, I'd appreciate that. On LeetCode, we are only allowed to change the ...
- 3,592
