#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int m,a[10010]; int main(){ cin>>m; for(int i=1;1<=m;i++){ cin>>a[i]; if(maxn<a[i]) maxn=a[i]; if(m1nn>a[i]) minn=a[i]; } cout<<maxn-minn<<endl; return 0; }