More Problems

• Write a program to check if a string contains balanced parentheses using a stack.
• Write a program to find the shortest path in a 2D grid using Dijkstra’s algorithm.
• Write a program to implement a binary search algorithm in a sorted array.
• Write a program to check if a binary tree is a valid AVL tree.
• Write a program to find the maximum product of any three numbers in an array.
• Write a program to implement a simple online quiz application with score tracking.
• Write a program to check if a number is an automorphic number using its digits.
• Write a program to find the longest substring without repeating characters using a sliding window.