水题。
#define _CRT_SECURE_NO_WARNINGS
#include <cstdio>
#include <algorithm>
#include <deque>
#include <iostream>
#include <string>
#include <math.h>
using namespace std;
int n;
int temp[1005];
int main() {
scanf("%d", &n);
for (int i = 1;i <= n;++i) {
scanf("%d", &temp[i]);
}
sort(temp + 1, temp + 1 + n);
printf("%d\n", temp[n] - temp[1] + 1 - n);
//system("pause");
return 0;
}
