More Problems

• Write a program to find the first character that appears twice in a string using a hash map.
• Given a string, write a function to check if it is a valid identifier using hashing.
• Implement a function to find the total number of vowels and consonants in a string using hashing.
• Create a program to find the longest sequence of unique numbers in an array using hashing.
• Write a function to count the total number of consonants in a string using a hash map.
• Given a string, write a program to check if it can be transformed into a valid number using hashing.
• Create a function to find the longest substring that is an anagram of another substring using hashing.
• Write a program to find the maximum frequency of any character in a string using a hash map.