#include <stdio.h>  
  
int main() {  
    int n;  
    scanf("%d", &n);   
  
    if (n <= 0 || n > 100) {  
        printf("输入的正整数无效\n");  
        return 1;  
    }  
  
    int min = 1000;  
    int max = 0;   
    int i, num;  
  
    for (i = 0; i < n; i++) {  
        scanf("%d", &num);   
  
        if (num < min) {  
            min = num;  
        } 
        if (num > max) {  
            max = num;   
        }  
    }  
  
    int range = max - min;  
    printf("%d\n", range);  
  
    return 0;  
}