More Problems

• Write a program to find the total number of distinct characters in a string using a hash map.
• Write a program to implement a simple online library system with search functionality.
• Write a program to check if a number can be expressed as the sum of four squares.
• Write a program to find the longest increasing subsequence using dynamic programming.
• Write a program to implement a basic online course management system with user registration.
• Write a program to check if two numbers are co-prime using their greatest common divisor (GCD).
• Write a program to find the maximum rectangle area in a binary matrix filled with 0s and 1s.
• Write a program to implement the QuickSort algorithm using recursion.