More Problems

• Write a program to find the first character that appears twice in a string using hashing.
• Create a function to find the longest substring with at least k repeating characters using hashing.
• Given two strings, write a function to determine if one string can be made by rearranging the other using hashing.
• Write a program to count the number of times a specific character appears in a string using hashing.
• Create a function that checks if two arrays contain the same elements but in different orders using hashing.
• Implement a function to find the longest substring that contains two distinct characters using hashing.
• 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.