All Questions
14 questions
13votes
5answers
2kviews
Array manipulation: add a value to each of the array elements between two given indices
This is a Hackerrank problem: https://www.hackerrank.com/challenges/crush/problem You are given a list of size \$N\$, initialized with zeroes. You have to perform \$M\$ operations on the list and ...
- 1,159
11votes
3answers
4kviews
Students with second lowest grade
I solved the Nested List Python challenge on HackerRank.com passing all test cases. Although this problem can likely be solved with a short script with clever one-liners, my approach was instead to ...
- 20.4k
10votes
4answers
3kviews
First non-repeating Character, with a single loop in Python
I recently tried to solve the first non-repeating character problem. Please tell me if my solution is valid. I'm aiming for O(n) with a single loop. My thinking is, it would be easy to tell you what ...
- 203
8votes
1answer
7kviews
Rearrange list by modifying the original list, put even-index values at front
I am relatively new to python and I am still trying to learn the basics of the language. I stumbled upon a question which asks you to rearrange the list by modifying the original. What you are ...
7votes
7answers
9kviews
Python address index +1 with list comprehension
Task from CodingBat: Return the sum of the numbers in the array, returning 0 for an empty array. Except the number 13 is very unlucky, so it does not count and numbers that come immediately after a ...
- 638
6votes
7answers
14kviews
Hacker rank 30 days of code Maximum Sum of Hourglass
I came up with this code as a solution to a contest question. The original question can be viewed here for attribution sake: Hackerrank 2d array problem Sample input is like this: ...
5votes
1answer
6kviews
(Codewars) Range Extraction
Kata: https://www.codewars.com/kata/range-extraction/python A format for expressing an ordered list of integers is to use a comma separated list of either individual integers or a range ...
- 1,792
3votes
2answers
2kviews
Maximum sub-array of non-negative numbers
This is the "Maximum sub-array" problem from CodeChef: Find out the maximum sub-array of non negative numbers from an array. The sub-array should be continuous. That is, a sub-array created ...
- 1,837
3votes
2answers
475views
2D array inquiries
I am trying to solve a problem as described below: You are given an input of a n*m forest. You have to answer a group of inquiries. Your task is to return the number of trees for every ...
- 175
3votes
1answer
158views
Finding the smartest set from an array of numbers
Is there any way to make this program run in better time ? While running, it is taking 1 second for the sample test case to pass and 5-10 seconds for the rest of the test cases. Problem statement ...
- 185
2votes
1answer
6kviews
HackerRank: Left Array Rotation in Python
Here is the problem on HackerRank. I want to know how I can improve this code. I am mainly trying to improve the following skills: Documentation, functional programming (top-down approach), accurately ...
1vote
2answers
506views
Maximum contiguous sum in an array
The following code is my solution for the following Daily Coding Challenge Given an array of numbers, find the maximum sum of any contiguous subarray of the array. For example, given the ...
- 2,133
1vote
1answer
412views
Perform various actions on a list
I am solving the following HackerRank problem: Consider a list (list = []). You can perform the following commands: insert i e: Insert integer e at position i. <...
- 301
0votes
2answers
741views
Find the maximum value of | Ai - Aj | + | i - j |: [closed]
hackerearth.com practice problem Can you solve it?: Given an array 'A' consisting of 'n' integers, find the maximum value of the following expression: \$\lvert A_i - A_j\rvert + \lvert i - j\rvert\...
