Toolliyo Practice

Problems explorer

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

505 problems in this topic

# Title Topics Acceptance Pts Difficulty
201 Merge Two Sorted Lists — 20 Easy Solve
202 Min Stack — 30 Medium Solve
203 Number of 1 Bits — 20 Easy Solve
204 Palindromic Substrings — 30 Medium Solve
205 Partition Labels — 30 Medium Solve
206 Redundant Connection — 30 Medium Solve
207 Reorder List — 30 Medium Solve
208 Rotate Image — 30 Medium Solve
209 Design Add and Search Words Data Structure — 30 Medium Solve
210 Design Twitter — 30 Medium Solve
211 Detect Squares — 30 Medium Solve
212 Evaluate Reverse Polish Notation — 30 Medium Solve
213 Implement Trie (Prefix Tree) — 30 Medium Solve
214 LRU Cache — 30 Medium Solve
215 Merge k Sorted Lists — 40 Hard Solve
216 Minimum Interval to Include Each Query — 40 Hard Solve
217 N-Queens — 40 Hard Solve
218 Palindrome Partitioning — 30 Medium Solve
219 Regular Expression Matching — 40 Hard Solve
220 Search a 2D Matrix — 30 Medium Solve
221 Set Matrix Zeroes — 30 Medium Solve
222 Swim in Rising Water — 40 Hard Solve
223 Unique Paths — 30 Medium Solve
224 Valid Anagram — 20 Easy Solve
225 Design Twitter — 30 Medium Solve
226 Distinct Subsequences — 40 Hard Solve
227 Koko Eating Bananas — 30 Medium Solve
228 Longest Consecutive Sequence — 30 Medium Solve
229 Longest Palindromic Substring — 30 Medium Solve
230 Merge Two Sorted Lists — 20 Easy Solve
231 Multiply Strings — 30 Medium Solve
232 Number of 1 Bits — 20 Easy Solve
233 Partition Labels — 30 Medium Solve
234 Reverse Integer — 30 Medium Solve
235 Same Tree — 20 Easy Solve
236 Subtree of Another Tree — 20 Easy Solve
237 Surrounded Regions — 30 Medium Solve
238 Task Scheduler — 30 Medium Solve
239 Walls and Gates — 30 Medium Solve
240 Word Search — 30 Medium Solve
241 Combination Sum II — 30 Medium Solve
242 Construct Binary Tree from Preorder and Inorder Traversal — 30 Medium Solve
243 Gas Station — 30 Medium Solve
244 Graph Valid Tree — 30 Medium Solve
245 Kth Smallest Element in a BST — 30 Medium Solve
246 LRU Cache — 30 Medium Solve
247 Longest Substring Without Repeating Characters — 30 Medium Solve
248 Minimum Interval to Include Each Query — 40 Hard Solve
249 Pacific Atlantic Water Flow — 30 Medium Solve
250 Partition Equal Subset Sum — 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