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April 26, 2016 06:51
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Check if BST is balanced
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| - (BOOL)isBSTBalanced:(Node *)root { | |
| return ([self maxHeight:root] - [self minHeight:root] <= 1); | |
| } | |
| - (NSUInteger)maxHeight:(Node *)root { | |
| if (root == null) { | |
| return 0; | |
| } | |
| return MAX([self maxHeight:root.leftNode], [self maxHeight:root.rightNode]) + 1; | |
| } | |
| - (NSUInteger)minHeight:(Node *)root { | |
| if (root == null) { | |
| return 0; | |
| } | |
| return MIN([self minHeight:root.leftNode], [self minHeight:root.rightNode]) + 1; | |
| } |
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