More Problems

• Create a program to count the total number of vowels in a string using a hash map.
• 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 count the number of unique characters in a string using a hash set.
• Implement a function to check if two strings can be rearranged to form a palindrome using hashing.
• Create a program to find the maximum product of any two numbers in an array using hashing.
• Write a function to find the longest substring with exactly one repeating character using hashing.
• Given a string, write a program to count the occurrences of each character using a hash map.
• Implement a function to find the longest substring that is a palindrome using hashing.