# include<iostream> using namespace std; int main(){ int m,a[10010],maxn=-10010,minn=10010; cin>>m; for(int i=1;i<=m;i++){ cin>>a[i]; if(maxn<a[i])maxn=a[i]; if(minn>a[i])minn=a[i]; } cout<<maxn-minn<<endl; return 0; }