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
1051 Top K Frequent Elements — 30 Medium Solve
1052 Trapping Rain Water — 40 Hard Solve
1053 Valid Anagram — 20 Easy Solve
1054 Valid Sudoku — 30 Medium Solve
1055 Walls and Gates — 30 Medium Solve
1056 Word Search — 30 Medium Solve
1057 3Sum — 30 Medium Solve
1058 Alien Dictionary — 40 Hard Solve
1059 Binary Tree Level Order Traversal — 30 Medium Solve
1060 Cheapest Flights Within K Stops — 30 Medium Solve
1061 Combination Sum II — 30 Medium Solve
1062 Contains Duplicate — 20 Easy Solve
1063 Copy List with Random Pointer — 30 Medium Solve
1064 Count Good Nodes in Binary Tree — 30 Medium Solve
1065 Course Schedule II — 30 Medium Solve
1066 Evaluate Reverse Polish Notation — 30 Medium Solve
1067 Find the Duplicate Number — 30 Medium Solve
1068 Gas Station — 30 Medium Solve
1069 Gas Station — 30 Medium Solve
1070 Happy Number — 20 Easy Solve
1071 Interleaving String — 30 Medium Solve
1072 Invert Binary Tree — 20 Easy Solve
1073 Koko Eating Bananas — 30 Medium Solve
1074 Koko Eating Bananas — 30 Medium Solve
1075 Kth Largest Element in a Stream — 20 Easy Solve
1076 Kth Largest Element in a Stream — 20 Easy Solve
1077 Last Stone Weight — 20 Easy Solve
1078 Last Stone Weight — 20 Easy Solve
1079 Letter Combinations of a Phone Number — 30 Medium Solve
1080 Longest Consecutive Sequence — 30 Medium Solve
1081 Longest Increasing Path in a Matrix — 40 Hard Solve
1082 Longest Substring Without Repeating Characters — 30 Medium Solve
1083 Lowest Common Ancestor of a Binary Search Tree — 30 Medium Solve
1084 Max Area of Island — 30 Medium Solve
1085 Maximum Depth of Binary Tree — 20 Easy Solve
1086 Meeting Rooms II — 30 Medium Solve
1087 Merge Triplets to Form Target Triplet — 30 Medium Solve
1088 Merge k Sorted Lists — 40 Hard Solve
1089 Min Cost Climbing Stairs — 20 Easy Solve
1090 Min Stack — 30 Medium Solve
1091 Missing Number — 20 Easy Solve
1092 Multiply Strings — 30 Medium Solve
1093 Multiply Strings — 30 Medium Solve
1094 Non-overlapping Intervals — 30 Medium Solve
1095 Number of Connected Components in an Undirected Graph — 30 Medium Solve
1096 Pacific Atlantic Water Flow — 30 Medium Solve
1097 Palindromic Substrings — 30 Medium Solve
1098 Partition Equal Subset Sum — 30 Medium Solve
1099 Partition Labels — 30 Medium Solve
1100 Permutations — 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