More Problems

• Write a function to check if two strings can be made identical by swapping characters using hashing.
• Given an array, write a program to find the first unique element using hashing.
• Implement a function to find the longest palindromic substring in a given string using hashing.
• Create a program to count the frequency of letters in a string using a hash table.
• Write a function to find the maximum length of a substring that contains at most one repeating character using hashing.
• Create a function to determine if two arrays have any elements in common using hashing.
• Write a program to find the first character that appears twice in a string using a hash map.
• Given a string, write a function to check if it is a valid identifier using hashing.