More Problems

• Write a program to implement a simple online polling system.
• Write a program to check if a binary tree is a valid binary search tree.
• Write a program to find the maximum depth of a binary tree using recursion.
• Write a program to implement the selection sort algorithm.
• Write a program to check if a string is a valid URL using regex.
• Write a program to find the shortest path in a weighted graph using the Dijkstra algorithm.
• Write a program to implement a basic event scheduling application.
• Write a program to check if a string is a valid email address using regex.