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Topic: Java-language-question / Level: Intermediate
380. Write a program to find the number of valid combinations of parentheses.
381. Write a program to find the number of paths in a grid with barriers.
382. Write a program to implement a simple task scheduler.
383. Write a program to check if two binary trees are identical.
384. Write a program to find the maximum sum of a path from the top to the bottom of a triangle.
385. Write a program to implement a simple calendar application.
386. Write a program to find the longest palindrome in a linked list.
387. Write a program to calculate the number of unique paths in a 3D grid.
388. Write a program to check if a number is a triangular number.
389. Write a program to find the maximum length of a balanced substring in a string.
390. Write a program to implement a simple chat application.
391. Write a program to find the number of unique values in a 2D array.
392. Write a program to find the longest substring without repeating characters using a sliding window.
393. Write a program to implement a simple text-based RPG.
394. Write a program to find the maximum length of a consecutive sequence of characters in a string.
395. Write a program to check if a string can be converted to another string by modifying one character.
396. Write a program to find the maximum number of consecutive 1s in a binary array.
397. Write a program to implement a simple data visualization tool.
398. Write a program to find the number of ways to climb stairs with N steps using 1 or 2 steps at a time.
399. Write a program to check if a linked list has a cycle using the fast and slow pointer technique.
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