[数据结构与算法]1339B - Sorted Adjacent Differences

题目：https://codeforces.com/problemset/problem/1339/B

题意：

?

题解：只需要排序一下，然后从中间向外?开始输出。

#include <iostream>
#include <algorithm>
using namespace std;
const int N = 1e5 + 5;
int a[N];
int main()
{
	int t;
	cin >> t;
	while (t--)
	{
		int n;
		cin >> n;
		for (int i = 0; i < n; i++)
			cin >> a[i];
		sort(a, a + n);
		if (n & 1)
			cout << a[n / 2] << " ";
		for (int i = n / 2 - 1; i >= 0; i--)
			cout << a[i] << " " << a[n - i - 1] << " ";
		cout << endl;
	}
}