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Topic: Java-language-question / Level: Intermediate
350. Write a program to calculate the number of unique pairs in an array that sum up to a target.
351. Write a program to find the minimum number of steps required to convert one string to another.
352. Write a program to implement a simple web scraper.
353. Write a program to find the longest alternating subsequence in an array.
354. Write a program to calculate the number of times a character appears in a string using a recursive function.
355. Write a program to find the maximum sum of a non-contiguous subarray.
356. Write a program to implement a simple messaging application.
357. Write a program to find the shortest path between two nodes in a graph.
358. Write a program to check if a binary tree is a complete binary tree.
359. Write a program to find the maximum sum of a contiguous circular subarray.
360. Write a program to implement a simple quiz application.
361. Write a program to find the number of subarrays that sum to a given value.
362. Write a program to calculate the number of ways to form a triangle from given lengths.
363. Write a program to implement a simple password generator.
364. Write a program to find the longest path in a directed graph with cycles.
365. Write a program to implement a simple recipe manager.
366. Write a program to find the number of unique combinations of coins to make a given amount.
367. Write a program to check if two strings can be made equal by swapping one character.
368. Write a program to find the longest substring that contains at most two types of characters.
369. Write a program to implement a simple e-commerce application.
370. Write a program to find the minimum number of squares that sum up to a given number.
371. Write a program to calculate the number of unique permutations of a string with duplicate characters.
372. Write a program to find the longest consecutive sequence of numbers in an array.
373. Write a program to implement a simple URL shortener.
374. Write a program to check if a binary tree is balanced.
375. Write a program to find the number of ways to tile a floor using 1x2 tiles.
376. Write a program to implement a simple file encryption tool.
377. Write a program to find the longest prefix that is also a suffix in a string.
378. Write a program to check if a binary tree is symmetric.
379. Write a program to implement a simple API client.
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