More Problems

• Implement a function to find the first character that appears three times in a string using a hash map.
• Create a program to check if a string is a valid email address using hashing.
• Write a function to find the total number of unique words in a paragraph using hashing.
• Given two strings, write a program to determine if they are equal when case is ignored using hashing.
• Implement a function to count the total number of digits in a string using a hash map.
• Create a program to find the longest substring that is an anagram of another substring using hashing.
• Write a function to check if a string can be rearranged to form a palindrome using hashing.
• Given a string, write a program to find the first unique character in a string using a hash map.