More Problems

• Implement a function to find the maximum product of any two numbers in an array using hashing.
• Create a program to check if a string is a valid identifier using hashing.
• Write a function to find the first character that appears twice in a string using a hash map.
• Given a string, write a program to find the longest substring that is an anagram of another substring using hashing.
• Implement a function to check if a string contains balanced parentheses using a hash map.
• Create a program to find the frequency of each word in a sentence using a hash map.
• Write a function to find the longest substring with exactly one repeating character using hashing.
• Given an array of integers, write a program to determine if it contains duplicate elements using a hash set.