#include <stdio.h>
int main() {
int num = 0;
int min = 100;
int max = 0;
while (scanf("%d", &num) != EOF)
{
int temp = 0;
for (int i = 0; i < num; i++)
{
scanf("%d ",&temp);
if (min > temp)
{
min = temp;
}
if (max < temp)
{
max = temp;
}
}
printf("%d\n",max - min);
}
return 0;
}

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