More Problems

• Given a string, write a program to find all unique characters using a hash set.
• Implement a function to check if a string is a valid email address using hashing.
• Create a program to find the frequency of elements in a list using a hash map.
• Write a function to find the first non-repeating character in a string using a hash table.
• Given two strings, implement a function to check if they are equal when case is ignored using hashing.
• Create a program to find the first character that occurs more than twice in a string using hashing.
• Write a function to count the occurrences of a specific character in a string using a hash map.
• Implement a function to find the maximum frequency of any digit in a number using a hash map.