More Problems

• Write a function to find the first unique character 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.
• Implement a function to find the frequency of each letter in the English alphabet in a string using a hash map.
• Create a program to find the maximum product of two distinct elements in an array using hashing.
• Write a function to count the occurrences of each character in a string using a hash map.
• Given two strings, implement a function to check if they are anagrams using hashing.
• Create a program to find the longest substring with exactly one repeating character using hashing.
• Write a function to determine if two strings can be rearranged to form a valid word using hashing.