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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
101 Sliding Window Maximum — 40 Hard Solve
102 Walls and Gates — 30 Medium Solve
103 Contains Duplicate — 20 Easy Solve
104 Contains Duplicate — 20 Easy Solve
105 Course Schedule II — 30 Medium Solve
106 Design Add and Search Words Data Structure — 30 Medium Solve
107 Design Add and Search Words Data Structure — 30 Medium Solve
108 Detect Squares — 30 Medium Solve
109 Encode and Decode Strings — 30 Medium Solve
110 Happy Number — 20 Easy Solve
111 Meeting Rooms — 20 Easy Solve
112 Meeting Rooms II — 30 Medium Solve
113 Reverse Linked List — 20 Easy Solve
114 Sliding Window Maximum — 40 Hard Solve
115 Valid Anagram — 20 Easy Solve
116 Valid Anagram — 20 Easy Solve
117 Walls and Gates — 30 Medium Solve
118 Encode and Decode Strings — 30 Medium Solve
119 Encode and Decode Strings — 30 Medium Solve
120 Find the Duplicate Number — 30 Medium Solve
121 Graph Valid Tree — 30 Medium Solve
122 Implement Trie (Prefix Tree) — 30 Medium Solve
123 Meeting Rooms — 20 Easy Solve
124 Merge Two Sorted Lists — 20 Easy Solve
125 Merge Two Sorted Lists — 20 Easy Solve
126 Merge k Sorted Lists — 40 Hard Solve
127 Serialize and Deserialize Binary Tree — 40 Hard Solve
128 Walls and Gates — 30 Medium Solve
129 Walls and Gates — 30 Medium Solve
130 Add Two Numbers — 30 Medium Solve
131 Contains Duplicate — 20 Easy Solve
132 Design Add and Search Words Data Structure — 30 Medium Solve
133 Detect Squares — 30 Medium Solve
134 Generate Parentheses — 30 Medium Solve
135 Graph Valid Tree — 30 Medium Solve
136 House Robber II — 30 Medium Solve
137 Implement Trie (Prefix Tree) — 30 Medium Solve
138 Kth Largest Element in an Array — 30 Medium Solve
139 Meeting Rooms — 20 Easy Solve
140 Meeting Rooms II — 30 Medium Solve
141 Merge k Sorted Lists — 40 Hard Solve
142 Missing Number — 20 Easy Solve
143 Product of Array Except Self — 30 Medium Solve
144 Add Two Numbers — 30 Medium Solve
145 Alien Dictionary — 40 Hard Solve
146 Design Add and Search Words Data Structure — 30 Medium Solve
147 Encode and Decode Strings — 30 Medium Solve
148 Invert Binary Tree — 20 Easy Solve
149 Merge Two Sorted Lists — 20 Easy Solve
150 Merge k Sorted Lists — 40 Hard Solve
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