CCF认证 201809-1卖菜

#include<iostream>
using namespace std;
const int N=1000;
int a[N+10];
int main()
{
	int n;
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		cin>>a[i];
	}
	for(int i=1;i<=n;i++)
	{
		if(i!=1)
		   cout<<" ";
		if(i==1)
		   cout<<(a[i]+a[i+1])/2;
		else if(i==n)
		   cout<<(a[i]+a[i-1])/2;
		else
		   cout<<(a[i-1]+a[i]+a[i+1])/3;
	}
	return 0;	
}
/*
8
4 1 3 1 6 5 17 9
*/