More Problems

• Write a program to check if a string is a valid phone number using regex.
• Write a program to find the sum of the first n prime numbers.
• Write a program to implement a basic file compression algorithm using Huffman coding.
• Write a program to check if a number can be expressed as the sum of two squares.
• Write a program to find the maximum sum of a non-contiguous subarray using dynamic programming.
• Write a program to implement a simple text editor with undo and redo functionality.
• Write a program to check if two strings are anagrams of each other by sorting.
• Write a program to find the longest common substring between two strings using dynamic programming.