本蒟蒻本地测试非常行，洛谷上却只有58分，请问我哪里错了！！！

#include<iostream>
using namespace std;
long long maxx;
long long minn;
int a[1000005];
int main() {
	int n;
	scanf("%d",&n);
	for(int i = 1; i <= n; i++) {
		scanf("%d",&a[i]);
		if(i == 1) {
			maxx = a[i];
			minn = a[i];
		}
		if(maxx < a[i]) maxx = a[i];
		if(minn > a[i]) minn = a[i];
	}
	printf("%ld",maxx - minn);
	return 0;
}