#include<iostream>
int n,a[101];
using namespace std;
int main()
{
cin>>n;
for(int i=0;i<=n;i++) cin>>a[i];
if(a[0]==-1) cout<<"-";
else if(a[0]!=1) cout<<a[0];
cout<<"x^"<<n;
for(int i=1;i<=n-2;i++)
{
if(a[i]==0) continue;
if(a[i]==-1) cout<<"-";
if(a[i]>0) cout<<"+";
if(a[i]!=-1&&a[i]!=1) cout<<a[i];
cout<<"x^"<<n-i;
}
if(a[n-1]!=0)
{
if(a[n-1]==-1) cout<<"-";
if(a[n-1]>0) cout<<"+";
if(a[n-1]!=-1&&a[n-1]!=1) cout<<a[n-1];
cout<<"x";
}
if(a[n]!=0)
{
if(a[n]==-1) cout<<"-";
if(a[n]>0) cout<<"+";
if(a[n]!=-1&&a[n]!=1) cout<<a[n];
}
cout<<endl;
return 0;
}
求助大神，帮我看看哪儿错了，感激不尽