Calculate the Total Amount of Points using Java
October 1, 2020
The challenge Our football team finished the championship. The result of each match look like “x:y”.
Read More
FizzBuzz in Java
July 11, 2020
The challenge Write a program that outputs the string representation of numbers from 1 to n.
Read More
Get the Next Small Integer in Python
July 8, 2020
The challenge Write a function: def solution(A) that, given an array A of N integers, returns the smallest positive integer (greater than 0) that does not occur in A.
Read More
Find Numbers with Even Number of Digits using Java
June 18, 2020
The challenge Given an array nums of integers, return how many of them contain an even number of digits.
Read More
How to use a Java HashSet by example
June 16, 2020
What is a HashSet A HashSet is an unordered collection containing unique elements.
Read More
Get The Shortest Path in Binary Matrix using Python
June 15, 2020
The challenge In an N by N square grid, each cell is either empty (0) or blocked (1).
Read More
Palindrome Partitioning in Python
June 14, 2020
The problem Given a string s, partition s such that every substring of the partition is a palindrome.
Read More
Best Time to Buy and Sell Stock with Python
June 12, 2020
The problem Say you have an array prices for which the ith element is the price of a given stock on day i.
Read More
Find the Minimum Absolute Difference in BST using Java
June 2, 2020
The question Given a binary search tree with non-negative values, find the minimum absolute difference between values of any two nodes.
Read More
Find Maximum Subarrays using Java
May 31, 2020
The problem Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum.
Read More
Finding Number Complements using Java
May 30, 2020
The problem Given a positive integer num, output its complement number.
Read More
Self Dividing Numbers using Python
May 28, 2020
Introduction A self-dividing number is a number that is divisible by every digit it contains.
Read More
Remove the Outermost Parentheses using Python
May 15, 2020
The Question A valid parentheses string is either empty (""), "(" + A + ")", or A + B, where A and B are valid parentheses strings, and + represents string concatenation.
Read More
Get the Maximum Length of a Concatenated String with Unique Characters in Python
April 18, 2020
The problem Given an array of strings arr. String s is a concatenation of a sub-sequence of arr which have unique characters.
Read More
How to get the Range Sum of Binary Search Tree using Java
April 9, 2020
Given the root node of a binary search tree, return the sum of values of all nodes with value between L and R (inclusive).
Read More
How to duplicate zeros in place using Python
April 8, 2020
Given a fixed length array arr of integers, duplicate each occurrence of zero, shifting the remaining elements to the right.
Read More
How to Reorder Data in Log Files using Python
April 2, 2020
Let’s say that you have an array or a list, or logs.
Read More
Find positions of largest groups of characters in a String with Python
March 29, 2020
The question Take a string S of lowercase letters. These letters form consecutive groupings of like characters.
Read More
How to find the longest Palindrome in a String using Python
February 27, 2020
This occasionally comes up during coding interviews and is actually quite a decent way to test someone’s aptitude of moving back and forth on a string to determine if and where palindromes exist.
Read More
How to get the Maximum Depth of a Binary Tree in Python
February 24, 2020
Let’s say that you have a binary tree and we needed to know it’s maximum depth.
Read More
What is Fizz Buzz?
February 23, 2020
Fizz buzz is a common programming interview question. The problem statement usually reads something like this:
Read More
How to write a Quicksort Algorithm in Python
February 21, 2020
While there are libraries available for all programming languages that offer abilities to sort list, arrays and collections, it is important to know how this is achieved.
Read More
How to Reverse a String or List using Python
February 20, 2020
Python comes with the power of slicing. Let’s try it with a String:
Read More
How to Reverse a Binary Tree in Python
February 18, 2020
Reversing a Binary Tree is a common programming interview question.
Read More