array

Second Largest Element

Given an array of integers, return the second largest element.

Two Sum

Given an array of integers, return indices of the two numbers such that they add up to a specific target.

Find the Missing Number

Given an array of integers, return the missing number.

Reverse Array

Given an array of integers, return the array in reverse order.

Remove Duplicates

Given an array of integers, return the array without any duplicates.

Peak Element

Find a peak element which is not smaller than its neighbours

Elevator Stops

Mohan lives in a building with an elevator that only stops on specific floors following a special sequence. Starting from floors 1 and 2, each subsequent stop is the sum of the previous two. Given N floors, help Mohan identify which floors he can reach with this elevator's limited stops.

Linked List Cycle

Given a singly linked list, determine if it contains a cycle (loop). A cycle occurs when a node's next pointer points back to a previous node in the list, causing an infinite loop in traversal.