More Problems

• Create a program that checks if a string can be formed from another string by removing characters using hashing.
• Implement a function to count the number of occurrences of each word in a sentence using a hash map.
• Write a program to check if a string is a valid IP address using hashing.
• Create a function to determine if a given number is a happy number using hashing.
• Given a list of words, write a function to find the longest word that can be formed using characters from another word using hashing.
• Write a program to count the total number of characters in a string ignoring spaces using hashing.
• Create a function that checks if two strings are anagrams of each other by sorting and comparing hashes.
• Implement a function to find the longest substring of unique characters in a string using a hash set.