Maximum Profit in Job Scheduling

Decode Ways II

Find duplicate elements in the array with 4KB memory only

Design a data structure for generic deck of cards

Design data structures for an online book reader system

Design the classes and data structures for a call center

Boats to Save People

Find Second largest element in an array

Find duplicate number in array containing n+1 numbers between 1 and n

Kadane's Algorithm for Maximum Subarray Sum