More Problems

• Write a function to find the first unique integer in an array using a hash map.
• 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 first character that appears three times in a string using a hash map.
• Create a program to find the longest substring that contains only digits using hashing.
• Write a function to check if two strings can be rearranged to form a palindrome using hashing.
• Given an array of integers, write a program to determine if it can be partitioned into two subsets with equal sums using hashing.
• Create a function to find the maximum product of three numbers in an array using hashing.
• Write a program to count the total number of uppercase letters in a string using hashing.