#include <stdio.h> #include <stdlib.h> int compare(const void *a,const void *b) { return *(short *)a - *(short *)b; } int main(void) { char n,k,i; short m[9]; scanf("%hhd",&n); scanf("%hhd",&k); for (i=0;i<n;i++) scanf("%hd",&m[i]); qsort(m,n,sizeof(short),compare); printf("%hd\n",m[n-1]-m[0]); return 0; }