#include <iostream>
#include <algorithm>
using namespace std;
int main() {
int n, score, maxn=0, minn=1001;
cin>>n;
for(int i=0;i<n;i++){
cin>>score;
maxn=max(score, maxn);
minn=min(score,minn);
}
cout<<maxn-minn;
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8YWxnb3JpdGhtPgoKdXNpbmcgbmFtZXNwYWNlIHN0ZDsKCmludCBtYWluKCkgewoJaW50IG4sIHNjb3JlLCBtYXhuPTAsIG1pbm49MTAwMTsKCWNpbj4+bjsKCQoJZm9yKGludCBpPTA7aTxuO2krKyl7CgkJY2luPj5zY29yZTsKCQkKCQltYXhuPW1heChzY29yZSwgbWF4bik7CgkJbWlubj1taW4oc2NvcmUsbWlubik7Cgl9CgkKCWNvdXQ8PG1heG4tbWlubjsKCQoJcmV0dXJuIDA7Cn0=