More Problems

• Write a program to implement a simple online food delivery service.
• Write a program to check if a string is a valid base64 encoded string.
• Write a program to find the first non-repeating digit in an array.
• Write a program to implement a basic file uploader application.
• Write a program to check if a number is a perfect square using the binary search method.
• Write a program to find the maximum sum of elements in a subarray of size k.
• Write a program to implement a simple online contact manager.
• Write a program to check if a string is a valid palindrome considering punctuation.