Codeforces 1041 A. Heist

水题一发

题意：找到丢失的数字

#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <ctime>
#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <deque>
#include <list>
#include <set>
#include <map>
#include <stack>
#include <queue>
#include <numeric>
#include <iomanip>
#include <bitset>
#include <sstream>
#include <fstream>
#define debug puts("-----")
#define pi (acos(-1.0))
#define eps (1e-8)
#define inf (1<<30)
using namespace std;

int a[1100];

int main(int argc, char const *argv[])
{
	int n;
	cin>>n;
	for (int i = 0; i < n; ++i)
		cin>>a[i];
	sort(a, a+n);
	int ans = a[n-1]-a[0]-n+1;
	cout<<ans<<endl;

	return 0;
}