More Problems

• Write a program to find the first character that occurs an even number of times in a string using hashing.
• Implement a function to count the total number of vowels in a string using a hash table.
• Create a program to find the longest substring with exactly one distinct character using hashing.
• Write a function to check if a string contains any digits using hashing.
• Given a list of words, write a program to count the frequency of each word using a hash map.
• Implement a function to find the total number of unique characters in two strings combined using hashing.
• Create a program to check if a string contains only digits using a hash set.
• Write a function to find the longest substring with exactly two distinct characters using hashing.