More Problems

• Given a string, write a program to find the first non-repeating character using a hash map.
• Implement a function to find the total number of characters in a string excluding spaces using hashing.
• Create a program to check if two strings are isomorphic using hashing.
• Write a function to find the frequency of elements in a list using a hash map.
• Given a string, implement a function to count the total number of unique letters using hashing.
• Create a program that checks if a list contains any duplicates using a hash set.
• Write a function to find the longest substring with exactly two distinct characters using hashing.
• Implement a function to count the frequency of each letter in the English alphabet in a string using a hash map.