最大值和最小值提前设定成边界值

#include<iostream>
using namespace std;
int main(){
    long long n;
    cin >> n;
    long long max = -1000000000, min = 1000000000; //最大值和最小值直接设定成边界值
    for(int i = 0; i <= n; i ++){
        long long x;
        cin >> x;
        if(x >= max){max = x;}
        if(x <= min){min = x;}
    }
    cout << max - min;
    return 0;
}