More Problems

• Create a function that finds all elements that appear more than once in an array using a hash map.
• Implement a function to find the minimum element in an array using a hash map for tracking indices.
• Write a program to return the first repeated character in a string using a hash table.
• Create a function that checks if all characters in a string are unique using a hash set.
• Given a list of integers, write a function to find the second largest number using hashing.
• Implement a program to count the number of words in a sentence using a hash map.
• Create a function that returns the frequency of each word in a paragraph using hashing.
• Write a program to check if a given string has balanced parentheses using a hash map.