CF459B Pashmak and Flowers

Pashmak 想要给 Parmida一对花。有n朵花在花园里，每朵花都有一个魅力值bi，Pashmak想要两朵魅力值相差最大的花，问有多少种方案？

首先输入n (2

输出最大差异和方案数，中间用空格隔开

In the third sample the maximum beauty difference is $ 2 $ and there are $ 4 $ ways to do this: 1. choosing the first and the second flowers; 2. choosing the first and the fifth flowers; 3. choosing the fourth and the second flowers; 4. choosing the fourth and the fifth flowers.