Easy

# Implement Currying

Create a function `sum` that implements currying. Currying is a transformation of functions that translates a function from being callable as f(x, y, ...

Medium

# Folder Structure

Given a data object resembling a folder structure, create a folder structure UI resembling that of VS code with appropriate functionalities.

Medium

# Spiral Traversal

Given a 2D matrix of numbers, return a spiral traversal of the matrix in the clockwise direction.

Easy

# Three Number Sum

Given an array of integers, find three integers in the array that sum to a specific target number.

Medium

# Invert Binary Tree

Given a binary tree, invert the binary tree - Inverting a binary tree means that the resulting binary tree should be a mirror replica of the input bin...

Easy

# Remove Duplicates From a Linked List

Given a sorted linked list, delete all duplicates such that each element appear only once.

Medium

# Levenshtein Distance

Given 2 strings, find the minimum number of operations required to change one string to the other. An operation is defined as either replacement of a ...

Easy

# Binary Search

Given an array of sorted integers in ascending order, and a target integer, write a function to search target in nums array. If target exists, return ...

Medium

# Number of Ways To Make Change

Given a target amount and a set of denominations (coins), find the total number of ways the given target amount can be expressed by using the denomina...

Easy

# Countries List with Debounce

Debouncing is a method of preventing a function from being invoked too often, and instead of waiting a certain amount of time until it was last called...

Medium

# Find Successor

Given the root of a binary tree and a node in it, return the in-order successor of that node in the BST. If the given node has no in-order successor i...

Medium

# BST Construction

Construct a Binary Search Tree and implement that implements insert, search, traverse and delete methods.

Easy

# BST Traversal

Given a Binary Search Tree, Traverse the tree in Preorder, Postorder, and inorder traversal.

Easy

# Depth First Search

Depth-first search (DFS) is an algorithm for traversing or searching tree or graph data structures. The algorithm starts at the root node (selecting s...

Medium

# Minimum Number Of Coins To Make Change

Given an array of coins or denominations and a target sum, calculate the minimum number of coins required to match the total. Note that the coins arra...