#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

#define EPSILON (0.0000001)
#define rational_t double

int main(void)
{
	int k;
	int useku;
	int kroku;
	int i;
	int zad;
    rational_t s, l;
	
	scanf("%d", &zad);

	while (zad--) {
	 
	  scanf("%d %d", &k, &useku);
     
	   kroku = 0;
	   l = 0;
	   for (i = 0; i < useku; i++)
	   {
		   scanf("%lf",&s);

		   /*
		   printf("delka useku %f zbylo %f\n", s, l);
		   */
		   s -= l;
		   /*
		   printf ("odectu %d\n", (int) (s / k));
		   */
		   kroku += (int)(s / (rational_t) k);
		   s = (rational_t) fmod ((double) s, (double) k);
		   /*
		   printf ("s = %f\n", s);
		   */
		   if (abs(s) > EPSILON) {
				  kroku++;
		          l = (rational_t) sqrt((double) k*k - (double) s*s);
		   }
		   else
				  l = 0;
		   /*
		   printf("sz = %f l = %f p = %d\n-------------------\n",
						   s, l, kroku);
		   */
	   } /* for */
       	
	   
	   if (l != 0 && s < 0.5 * k)
			   kroku--;

	   printf("Strazny ujde %d ponorku.\n", kroku);
	
	}

	return 0;
}