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Problems explorer

Browse by topic · auto-judge · company sheets · roadmaps — not just a problem dump.

472 problems in this topic

# Title Topics Acceptance Pts Difficulty
401 Implement Trie (Prefix Tree) — 30 Medium Solve
402 Meeting Rooms II — 30 Medium Solve
403 Merge k Sorted Lists — 40 Hard Solve
404 Missing Number — 20 Easy Solve
405 Missing Number — 20 Easy Solve
406 Reverse Nodes in k-Group — 40 Hard Solve
407 Sliding Window Maximum — 40 Hard Solve
408 Valid Anagram — 20 Easy Solve
409 Walls and Gates — 30 Medium Solve
410 Alien Dictionary — 40 Hard Solve
411 Course Schedule II — 30 Medium Solve
412 Detect Squares — 30 Medium Solve
413 Generate Parentheses — 30 Medium Solve
414 Kth Smallest Element in a BST — 30 Medium Solve
415 Lowest Common Ancestor of a Binary Search Tree — 30 Medium Solve
416 Meeting Rooms — 20 Easy Solve
417 Number of Islands — 30 Medium Solve
418 Product of Array Except Self — 30 Medium Solve
419 Product of Array Except Self — 30 Medium Solve
420 Reverse Nodes in k-Group — 40 Hard Solve
421 Add Two Numbers — 30 Medium Solve
422 Alien Dictionary — 40 Hard Solve
423 Contains Duplicate — 20 Easy Solve
424 Encode and Decode Strings — 30 Medium Solve
425 Number of Islands — 30 Medium Solve
426 Reverse Nodes in k-Group — 40 Hard Solve
427 Contains Duplicate — 20 Easy Solve
428 Course Schedule — 30 Medium Solve
429 Lowest Common Ancestor of a Binary Search Tree — 30 Medium Solve
430 Meeting Rooms — 20 Easy Solve
431 Product of Array Except Self — 30 Medium Solve
432 Encode and Decode Strings — 30 Medium Solve
433 Implement Trie (Prefix Tree) — 30 Medium Solve
434 Meeting Rooms — 20 Easy Solve
435 Valid Anagram — 20 Easy Solve
436 Walls and Gates — 30 Medium Solve
437 Design Add and Search Words Data Structure — 30 Medium Solve
438 Product of Array Except Self — 30 Medium Solve
439 Reverse Linked List — 20 Easy Solve
440 Sliding Window Maximum — 40 Hard Solve
441 Walls and Gates — 30 Medium Solve
442 Merge Two Sorted Lists — 20 Easy Solve
443 Merge Two Sorted Lists — 20 Easy Solve
444 Sliding Window Maximum — 40 Hard Solve
445 Valid Anagram — 20 Easy Solve
446 Kth Smallest Element in a BST — 30 Medium Solve
447 Add Two Numbers — 30 Medium Solve
448 Alien Dictionary — 40 Hard Solve
449 Find the Duplicate Number — 30 Medium Solve
450 Merge k Sorted Lists — 40 Hard Solve
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