# Random Wits

Life is too short for a diary

\$ random wits
├── tags

├── bookshelf

├── resources

├── quotes

├── habits

# Posts Tagged “programming”

Tue 02 Nov 2021

## Coin Change solution leetcode

It's one of the most popular questions on leetcode that seems very easy at first. Coin change is a classic dynamic programming problem. I will proceed with an obvious (albeit wrong) solution and subsequently proceed to an efficient correct solution.

You are given an integer array coins representing coins of different denominations and an integer amount representing a total amount of money. Return the fewest number of coins that you need to make up that amount. If that amount of money cannot be made up by any combination of the coins, return -1. You may assume that you have an infinite number of each kind of coin...

Sun 12 Sep 2021

## Maximum Subarray

There's an interesting problem I recently solved on leetcode based on dynamic programming. My Github repository contains list of all problems that I have solved. I often start with a brute force approach without fretting about time complexity. Later I try to improve my algorithm for a better efficient solution.

Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum. A subarray is a contiguous part of an array.1

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Sat 07 Sep 2019

## Recursively sort a array

I recently came across a simple telephonic interview problem. The problem was to sort an array recursively. But even numbers need to be placed before odd numbers. At first glance it was obvious that it was a simple case of implementation of merge sort.

Problem Statement

Given an input array, produce the following output array…..

Tue 08 Jan 2019

## Merge Two Sorted Lists

Merge two sorted linked lists and return it as a new list.1. The new list should be made by splicing together the nodes of the first two lists.

It’s an easy problem in Leetcode for practicing linked list. It’s similar to the merge step of the Merge sort. ..

Tue 13 Nov 2018

## Three Sum Problem

Given an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero.1

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