More Problems

• Write a program to find the longest substring with at most two distinct characters using hashing.
• Create a function that counts the occurrences of each digit in a number using hashing.
• Given a string, write a function to find the longest substring of digits using hashing.
• Implement a function to find the minimum number of unique characters in a string using hashing.
• Write a program to check if a string can be formed from another string by adding characters using hashing.
• Create a function to determine if a string is a valid number using hashing.
• Given two strings, write a function to find the number of characters that need to be changed to make them equal using hashing.
• Write a program to count the total number of spaces in a string using hashing.