Topic: Hashing-question / Level: Intermediate

• 351. Write a program to find the total number of unique phrases in a document using hashing.
• 352. Implement a function to find the longest substring that starts with a vowel using hashing.
• 353. Create a hash table to store the mapping of TV show titles to their genres.
• 354. Write a program to find the maximum length of a contiguous subarray with a sum less than a target using hashing.
• 355. Implement a function to find all pairs of elements in an array that differ by a specific value using hashing.
• 356. Create a hash map to track the number of comments on different articles.
• 357. Write a program to find the first character that does not repeat in a string using hashing.
• 358. Implement a function to check if two strings are anagrams, ignoring case, using hashing.
• 359. Create a hash table to store the mapping of song titles to their lyrics.
• 360. Write a program to find the maximum length of a substring that contains at least one special character using hashing.
• 361. Implement a function to check if a string can be rearranged to form a valid palindrome, ignoring case, using hashing.
• 362. Create a hash map to track the number of active users on a website.
• 363. Write a program to find the longest substring that contains at least three different characters using hashing.
• 364. Implement a function to determine if a string is a valid expression of parentheses using hashing.
• 365. Create a hash table to store the mapping of artist names to their albums.
• 366. Write a program to find the total number of unique phrases in a set of sentences using hashing.
• 367. Implement a function to check if a string contains only alphabetic characters using hashing.
• 368. Create a hash map to track the number of shares for different articles on social media.
• 369. Write a program to find the maximum length of a substring that contains only digits and letters using hashing.
• 370. Implement a function to check if a string is a valid hexadecimal number using hashing.
• 371. Create a hash table to store the mapping of student IDs to their grades.
• 372. Write a program to find the total number of unique hashtags in a post using hashing.
• 373. Implement a function to find the longest substring that contains only numbers using hashing.
• 374. Create a hash map to track the number of clicks on different ads.
• 375. Write a program to find the first character that appears three times in a string using hashing.
• 376. Implement a function to check if two strings are anagrams of each other, considering case sensitivity, using hashing.
• 377. Create a hash table to store the mapping of product names to their descriptions.
• 378. Write a program to find the maximum length of a contiguous subarray with an equal number of positive and negative numbers using hashing.
• 379. Implement a function to find all unique triplets in an array that sum to zero using hashing.
• 380. Create a hash map to track the number of registrations for different events.

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