hdu 1673 Optimal Parking

#include<iostream>using namespace std;int main(){int n;scanf("%d", &n);while(n--){int m, max = -1, min = 100;scanf("%d", &m);for( int i=0; i < m; i++ ){int a;scanf("%d", &a);if(a > max)max = a;if(a < min)min = a;}printf("%d\n", (max-min) * 2);}return 0;}