#include <stdio.h>
int main()
{
int n, i, max=0, min=100, c;
int arr[10000] = {0};
scanf("%d\n", &n);
for(i=0; i<n; i++)
//每次循环输入一个值,并判断是否为最小值、最大值
{
scanf("%d ", &arr[i]);
if(arr[i] < min)
min = arr[i];
if(arr[i] > max)
max = arr[i];
}
c = max - min;
printf("%d\n", c);
return 0;
}

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