More Problems

• Implement a function to find the longest substring that contains at least one repeating character using hashing.
• Create a program that checks if two strings can be rearranged to form a valid word using hashing.
• Write a function to determine if a list contains any duplicates using a hash set.
• Given an array, write a program to find the count of elements that are unique using hashing.
• Implement a function to find the first character that appears twice in a string using a hash map.
• Create a program to count the occurrences of each letter in the English alphabet in a string using a hash map.
• Write a function to check if a string is a valid identifier using hashing.
• Given two strings, implement a function to find the longest common substring using a hash table.