C++ :

#include<stdio.h>
#include<time.h>
#include<stdlib.h>
int main()
{
	//FILE *fin, *fout;
	//fin= fopen("G:\\acm训练#2\\hdu1008_in.txt","w");
	//fout = fopen("G:\\acm训练#2\\hdu1008_out.txt","w");
	//srand(unsigned (time(0)));
	
	int n, sum, floor, a, date;	

	scanf("%d", &date);
	//fprintf(fin,"%d\n", date);
	for (int cas = 1; cas <= date;cas++)
	{
		scanf("%d", &n);
		//n = rand() % 100 + 1;
		//fprintf(fin, "%d\n", n);

		floor = 0;
		sum = 0;
		for (int i = 1; i <= n;i++)
		{
			scanf("%d", &a);
			//a = rand() % 100 + 1;
			//fprintf(fin, "%d ", a);
			sum += (a>floor ? 6 * (a - floor) : 4 * (floor - a));
			sum += 5;
			floor = a;
		}
		printf("%d\n", sum);
		//fprintf(fout, "%d\n", sum);
	}
	return 0;
}