More Problems

• Implement a function to find the first character that appears twice in a string using a hash map.
• Create a program to find the longest substring that contains the same character using hashing.
• Write a function to check if two arrays contain the same elements using hashing.
• Given a string, write a program to count the total number of unique characters in a string using hashing.
• Implement a function to find the longest substring that is a palindrome using hashing.
• Create a program to check if two strings can be rearranged to form a valid word using hashing.
• Write a function to find the maximum frequency of any character in a string using a hash map.
• Given a string, write a program to count the occurrences of each character using a hash map.