More Problems

• Given a string, write a function to find the longest substring of numbers using hashing.
• Write a program to count the number of unique characters in a string using a hash set.
• Create a function that checks if a string contains all uppercase letters using hashing.
• Implement a function to find the minimum character swaps required to make two strings equal using hashing.
• Write a program to find the maximum frequency of any digit in a number using a hash map.
• Create a function that checks if an array contains any even number using hashing.
• Given a string, write a function to count the total number of punctuation marks using hashing.
• Write a program to find the length of the longest substring that contains exactly two different characters using hashing.