#include <stdio.h>

int main() {
    int arr[10000];
    int scoreNum = 0;//成绩个数
    int maxScore = 0;//最高成绩
    int minScore = 0;//最低成绩
    scanf("%d", &scoreNum);//输入成绩个数
    for(int i = 0; i < scoreNum; i++)
    {//逐个输入成绩
        scanf("%d", &arr[i]);
        while(arr[i] > 100 || arr[i] < 0)
        {
            printf("成绩范围应为0~100,请重新输入成绩:");
            scanf("%d", &arr[i]);
        }
        if(0 == i)
        {
            maxScore = arr[i];
            minScore = arr[i];
        }
        else
        {
            if(maxScore < arr[i])
            {
                maxScore = arr[i];
            }
            if(minScore > arr[i])
            {
                minScore = arr[i];
            }
        }
    }
    printf("%d", maxScore - minScore);
    return 0;
}