More Problems

• Write a function to count the number of uppercase and lowercase letters in a string using hashing.
• Create a program that returns the first non-repeating character in a string using a hash map.
• Implement a function to find the maximum element that occurs more than once in an array using hashing.
• Write a program to find the frequency of each consonant in a string using a hash map.
• Create a function that checks if the elements in an array are in a specific range using a hash set.
• Given a string, write a program to find the shortest substring containing all unique characters using hashing.
• Implement a function to return the indices of all occurrences of a character in a string using a hash map.
• Write a program to find the first character that appears twice in a string using hashing.