题目描述：

LeetCode 545. Boundary of Binary Tree

Given a binary tree, return the values of its boundary in anti-clockwise direction starting from root. Boundary includes left boundary, leaves, and right boundary in order without duplicate nodes.

Left boundary is defined ...

题目描述：

LeetCode 537. Complex Number Multiplication

Given two strings representing two complex numbers.

You need to return a string representing their multiplication. Note i² = -1 according to the definition.

Example 1:

Input: "1+1i", "1+1i"
Output: "0+2i" ...

题目描述：

LeetCode 507. Perfect Number

We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors except itself.

Now, given an integer n, write a function that returns true when it ...

LeetCode Weekly Contest 24是LeetCode举办的第二十九场正式周赛，共4道题目，比赛时长1.5小时。

比赛链接：https://leetcode.com/contest/leetcode-weekly-contest-24/

题解列表：

LeetCode 543. Diameter of Binary Tree

LeetCode 538. Convert BST to Greater Tree

LeetCode 542. 01 Matrix

LeetCode 544. Output Contest Matches

题目描述：

LeetCode 544. Output Contest Matches

During the NBA playoffs, we always arrange the rather strong team to play with the rather weak team, like make the rank 1 team play with the rank n_th team, which is a ...