#include <stdio.h>
int main() {
int n;
int a[10000];
int max = 0 , min = 100;
scanf("%d",&n);
for (int i = 0; i<n; i++) {
scanf("%d",&a[i]);
}
for (int i = 0; i<n; i++) {
if (max<a[i]) {
max = a[i];
}
if (min>a[i]) {
min = a[i];
}
}
printf("%d",max-min);
return 0;
}

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