More Problems

• Given a string, write a program to find the longest substring that is a palindrome using hashing.
• Create a function that checks if a list contains any duplicates using a hash set.
• Write a function to find the maximum length of a substring that contains only digits using hashing.
• Implement a function to count the frequency of each letter in the English alphabet in a string using a hash map.
• Create a program to check if a string is a valid email address using hashing.
• Write a function to find the longest consecutive sequence of characters in a string using hashing.
• Given an array, write a program to find the count of elements that are unique using hashing.
• Implement a function to find the first unique integer in an array using a hash map.