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You are given the root node of a binary search tree (BST) and a value to insert into the tree. Return the root node of the BST after the insertion. It 阅读全文
posted @ 2020-10-06 22:57
Schwifty
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Given an array of integers nums and an integer k, return the number of unique k-diff pairs in the array. A k-diff pair is an integer pair (nums[i], nu 阅读全文
posted @ 2020-10-06 22:30
Schwifty
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A binary tree is named Even-Odd if it meets the following conditions: The root of the binary tree is at level index 0, its children are at level index 阅读全文
posted @ 2020-10-06 11:57
Schwifty
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Design a parking system for a parking lot. The parking lot has three kinds of parking spaces: big, medium, and small, with a fixed number of slots for 阅读全文
posted @ 2020-10-06 04:49
Schwifty
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