More Problems

• Write a function to count the total number of characters in a string excluding spaces using hashing.
• Given a string, write a program to find the first character that appears twice in a string using a hash map.
• Implement a function to count the frequency of each digit in a number using hashing.
• Create a program to find the longest substring that is a palindrome using hashing.
• Write a function to determine if two arrays have the same frequency of elements using hashing.
• Given an array, write a program to count the number of odd numbers using hashing.
• Implement a function to find the longest substring with exactly k distinct characters using hashing.
• Create a program to find the frequency of each letter in the English alphabet in a string using a hash map.