求大佬解答https://www.luogu.com.cn/problem/T446380?contestId=166340 最后三个测试点错了：

#include<bits/stdc++.h>
using namespace std;
int a,b[10000],s,n;
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>b[i];
		if(i==1) a+=b[i];
		else a+=(b[i]-b[i-1]);
		if(a>=8){
			s+=a/8;
			a%=8;
		}
		else if(a>=50){
			s+=a/8;
			a%=8;
			continue;
		}
	}
	cout<<s;
	return 0;
}