More Problems

• Create a program that checks if a string is a valid identifier using a hash table.
• Write a function to find the longest substring that contains the same character using hashing.
• Given a list of integers, write a program to find the count of negative numbers using a hash map.
• Implement a function to find the frequency of each letter in the English alphabet in a string using a hash map.
• Create a program that checks if a string can be rearranged to form a palindrome using hashing.
• Write a function to determine the maximum length of a subarray with distinct elements using hashing.
• Given two strings, implement a function to check if one string is a substring of another using hashing.
• Create a program to count the number of vowels in a string using a hash map.