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Topic: Java-language-question / Level: Intermediate
320. Write a program to check if a string is a rotation of another string using string concatenation.
321. Write a program to find the longest substring with a given sum.
322. Write a program to implement a simple user authentication system.
323. Write a program to find the maximum value of an expression from given numbers.
324. Write a program to calculate the longest path in a matrix with obstacles.
325. Write a program to implement a simple image viewer.
326. Write a program to find the first non-repeating character in a string using a hash map.
327. Write a program to find the longest decreasing subsequence in an array.
328. Write a program to calculate the number of permutations of a string.
329. Write a program to find the number of unique paths from top-left to bottom-right in a grid.
330. Write a program to implement a simple note-taking application.
331. Write a program to find the maximum product of two distinct numbers in an array.
332. Write a program to check if a matrix is a Latin square.
333. Write a program to find the longest valid parentheses substring using a stack.
334. Write a program to implement a simple text formatting application.
335. Write a program to calculate the number of ways to distribute candies among children.
336. Write a program to find the minimum cost path in a weighted grid.
337. Write a program to implement a simple budget tracker.
338. Write a program to find the maximum area of a rectangle in a binary matrix.
339. Write a program to find the longest substring with exactly K distinct characters.
340. Write a program to check if two strings are permutations of each other.
341. Write a program to find the longest substring of unique characters in a string.
342. Write a program to implement a simple web server.
343. Write a program to find the number of islands in a 2D grid using DFS.
344. Write a program to implement a simple text-based file manager.
345. Write a program to find the number of unique characters in a string.
346. Write a program to implement a simple file downloader.
347. Write a program to check if a number is a perfect square.
348. Write a program to find the longest subarray with a given sum.
349. Write a program to implement a simple multiplayer game.
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Write a program to find the minimum number of operations required to convert one string to another.
Write a program to check if two strings are anagrams.
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