More Problems

• Write a program to find the total number of characters in a string excluding duplicates using a hash set.
• Create a function that returns the frequency of the first 10 digits in a number using hashing.
• Given a list of integers, write a program to determine if any three numbers can form a triangle using hashing.
• Write a function to find the longest common prefix among a set of strings using a hash table.
• 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.