More Problems

• Given an array of integers, write a program to check if it contains duplicate elements using a hash set.
• Implement a function to find the total number of unique digits in a string using hashing.
• Create a program to count the frequency of each word in a book using a hash table.
• Write a function to find the first occurrence of a substring in a string using a hash map.
• Given a list of words, write a program to find the longest word using a hash map.
• Create a function that checks if two strings are isomorphic using a hash map.
• Write a program to find the first non-repeating character in a string using a hash table.
• Implement a function to count the number of substrings that are palindromes using a hash map.