More Problems

• Write a function to find the first character that appears twice in a string using a hash map.
• Given a string, write a program to find the total number of unique characters in a string using hashing.
• Implement a function to check if two strings can be rearranged to form a palindrome using hashing.
• Create a program to count the total number of characters in a string excluding spaces using hashing.
• Write a function to find the maximum frequency of any character in a string using a hash map.
• Given two strings, implement a function to check if they are equal when case is ignored using hashing.
• Create a program to find the longest substring that contains exactly one repeating character using hashing.
• Write a function to count the total number of characters in a string excluding digits using a hash map.