Toolliyo Practice

Problems explorer

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

8773 problems

# Title Topics Acceptance Pts Difficulty
401 Valid Parenthesis String — 30 Medium Solve
402 Word Search II — 40 Hard Solve
403 3Sum — 30 Medium Solve
404 Add Two Numbers — 30 Medium Solve
405 Best Time to Buy and Sell Stock with Cooldown — 30 Medium Solve
406 Binary Search — 20 Easy Solve
407 Clone Graph — 30 Medium Solve
408 Combination Sum — 30 Medium Solve
409 Combination Sum — 30 Medium Solve
410 Construct Binary Tree from Preorder and Inorder Traversal — 30 Medium Solve
411 Container With Most Water — 30 Medium Solve
412 Count Good Nodes in Binary Tree — 30 Medium Solve
413 Count Good Nodes in Binary Tree — 30 Medium Solve
414 Course Schedule — 30 Medium Solve
415 Design Add and Search Words Data Structure — 30 Medium Solve
416 Design Twitter — 30 Medium Solve
417 Edit Distance — 40 Hard Solve
418 Encode and Decode Strings — 30 Medium Solve
419 Evaluate Reverse Polish Notation — 30 Medium Solve
420 Find Median from Data Stream — 40 Hard Solve
421 Group Anagrams — 30 Medium Solve
422 Hand of Straights — 30 Medium Solve
423 House Robber — 30 Medium Solve
424 House Robber II — 30 Medium Solve
425 Insert Interval — 30 Medium Solve
426 Invert Binary Tree — 20 Easy Solve
427 Jump Game II — 30 Medium Solve
428 Koko Eating Bananas — 30 Medium Solve
429 Kth Largest Element in a Stream — 20 Easy Solve
430 Kth Smallest Element in a BST — 30 Medium Solve
431 Largest Rectangle in Histogram — 40 Hard Solve
432 Letter Combinations of a Phone Number — 30 Medium Solve
433 Linked List Cycle — 20 Easy Solve
434 Longest Common Subsequence — 30 Medium Solve
435 Longest Increasing Subsequence — 30 Medium Solve
436 Longest Palindromic Substring — 30 Medium Solve
437 Longest Substring Without Repeating Characters — 30 Medium Solve
438 Max Area of Island — 30 Medium Solve
439 Maximum Depth of Binary Tree — 20 Easy Solve
440 Maximum Subarray — 30 Medium Solve
441 Median of Two Sorted Arrays — 40 Hard Solve
442 Meeting Rooms — 20 Easy Solve
443 Merge Triplets to Form Target Triplet — 30 Medium Solve
444 Min Cost to Connect All Points — 30 Medium Solve
445 Min Stack — 30 Medium Solve
446 Min Stack — 30 Medium Solve
447 Minimum Interval to Include Each Query — 40 Hard Solve
448 Minimum Window Substring — 40 Hard Solve
449 Missing Number — 20 Easy Solve
450 N-Queens — 40 Hard Solve
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