More Problems

• Write a program to check if the characters in a string can form a palindrome using a hash map.
• Create a function to find the frequency of the first character in a string using hashing.
• Implement a program to return the characters that do not appear in another string using hashing.
• Write a function to find the sum of all unique elements in an array using a hash set.
• Create a function that checks if two strings are made of the same characters using a hash table.
• Given an integer, write a program to return the count of its prime factors using hashing.
• Write a function to count the number of uppercase and lowercase letters in a string using hashing.
• Create a program that returns the first non-repeating character in a string using a hash map.