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# Title Acceptance Difficulty
752 Open the Lock 37.8%
Medium
743 Network Delay Time 34.0%
Medium
690 Employee Importance 52.2%
Easy
675 Cut Off Trees for Golf Event 27.1%
Hard
542 01 Matrix 32.9%
Medium
529 Minesweeper 49.8%
Medium
515 Find Largest Value in Each Tree Row 55.4%
Medium
513 Find Bottom Left Tree Value 56.2%
Medium
505 The Maze II 39.0%
Medium
499 The Maze III 33.4%
Hard
490 The Maze 43.5%
Medium
417 Pacific Atlantic Water Flow 34.5%
Medium
407 Trapping Rain Water II 37.9%
Hard
323 Number of Connected Components in an Undirected Graph 48.8%
Medium
317 Shortest Distance from All Buildings 34.7%
Hard
310 Minimum Height Trees 29.0%
Medium
301 Remove Invalid Parentheses 35.8%
Hard
286 Walls and Gates 45.2%
Medium
279 Perfect Squares 37.7%
Medium
261 Graph Valid Tree 38.3%
Medium
210 Course Schedule II 29.7%
Medium
207 Course Schedule 33.2%
Medium
200 Number of Islands 36.1%
Medium
199 Binary Tree Right Side View 42.1%
Medium
133 Clone Graph 25.2%
Medium
130 Surrounded Regions 19.2%
Medium
127 Word Ladder 19.8%
Medium
126 Word Ladder II 14.7%
Hard
111 Minimum Depth of Binary Tree 33.5%
Easy
107 Binary Tree Level Order Traversal II 41.5%
Easy
103 Binary Tree Zigzag Level Order Traversal 36.1%
Medium
102 Binary Tree Level Order Traversal 41.6%
Medium
101 Symmetric Tree 39.9%
Easy