Toolliyo Practice

Problems explorer

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

2100 problems in this topic

# Title Topics Acceptance Pts Difficulty
651 Search a 2D Matrix 30 Medium Solve
652 Subtree of Another Tree 20 Easy Solve
653 Target Sum 30 Medium Solve
654 Task Scheduler 30 Medium Solve
655 Time Based Key-Value Store 30 Medium Solve
656 Two Sum 20 Easy Solve
657 Valid Sudoku 30 Medium Solve
658 Word Break 30 Medium Solve
659 Word Search 30 Medium Solve
660 Word Search 30 Medium Solve
661 Add Two Numbers 30 Medium Solve
662 Alien Dictionary 40 Hard Solve
663 Best Time to Buy and Sell Stock with Cooldown 30 Medium Solve
664 Burst Balloons 40 Hard Solve
665 Car Fleet 30 Medium Solve
666 Cheapest Flights Within K Stops 30 Medium Solve
667 Coin Change 30 Medium Solve
668 Coin Change 2 30 Medium Solve
669 Combination Sum II 30 Medium Solve
670 Construct Binary Tree from Preorder and Inorder Traversal 30 Medium Solve
671 Container With Most Water 30 Medium Solve
672 Count Good Nodes in Binary Tree 30 Medium Solve
673 Decode Ways 30 Medium Solve
674 Design Add and Search Words Data Structure 30 Medium Solve
675 Design Twitter 30 Medium Solve
676 Diameter of Binary Tree 20 Easy Solve
677 Encode and Decode Strings 30 Medium Solve
678 Evaluate Reverse Polish Notation 30 Medium Solve
679 Evaluate Reverse Polish Notation 30 Medium Solve
680 Find Minimum in Rotated Sorted Array 30 Medium Solve
681 Group Anagrams 30 Medium Solve
682 Insert Interval 30 Medium Solve
683 Invert Binary Tree 20 Easy Solve
684 Jump Game II 30 Medium Solve
685 Linked List Cycle 20 Easy Solve
686 Longest Increasing Path in a Matrix 40 Hard Solve
687 Longest Increasing Subsequence 30 Medium Solve
688 Maximum Depth of Binary Tree 20 Easy Solve
689 Maximum Product Subarray 30 Medium Solve
690 Maximum Subarray 30 Medium Solve
691 Merge Intervals 30 Medium Solve
692 Merge Two Sorted Lists 20 Easy Solve
693 Merge k Sorted Lists 40 Hard Solve
694 Min Cost Climbing Stairs 20 Easy Solve
695 Min Cost Climbing Stairs 20 Easy Solve
696 Min Stack 30 Medium Solve
697 Min Stack 30 Medium Solve
698 Number of Connected Components in an Undirected Graph 30 Medium Solve
699 Pacific Atlantic Water Flow 30 Medium Solve
700 Pacific Atlantic Water Flow 30 Medium Solve
Toolliyo Assistant
Ask about tutorials, ebooks, training, pricing, mentor services, and support. I use public site content only—not admin or internal tools.

care@toolliyo.com

Need callback? Share your details