为什么RE？

https://www.luogu.com.cn/problem/T270713

#include<bits/stdc++.h>
using namespace std;
int v1,v3,v7,n,v30,x,v120,v365,sum,a[10010];
int main()
{
	cin>>n;
	cin>>v1>>v3>>v7>>v30>>v120>>v365;
	for(int i=1;i<=n;i++)
	{
		cin>>x;
		if(x==0)a[i]=0;
		else a[i]=a[i-1]+1;
		
		if(a[i]>=1&&a[i]<=2)sum+=v1;
		if(a[i]>=3&&a[i]<=6)sum+=v3;
		if(a[i]>=7&&a[i]<=29)sum+=v7;
		if(a[i]>=30&&a[i]<=119)sum+=v30;
		if(a[i]>=120&&a[i]<=364)sum+=v120;
		if(a[i]>=365)sum+=v365;
	}
	cout<<sum;
	return 0;
}