More Problems

• Implement a function to find the total number of unique characters in a string using a hash set.
• Create a program to check if a string is a valid email address using hashing.
• Write a function to find the longest substring that contains the same character using hashing.
• Given a list of integers, write a program to count the total number of odd numbers using a hash set.
• Implement a function to find the longest substring with exactly k distinct characters using hashing.
• Create a program to find the total number of unique words in a paragraph using hashing.
• Write a function to determine if two strings can be transformed into a palindrome using hashing.
• Given a string, write a program to check if it can be transformed into a valid number using hashing.