#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,a[105];
	cin>>n;
	for(int i=1;i<=n+1;i++){
		cin>>a[i];
	}
	if(n==0){
		cout<<a[1];
		return 0;
	} 
	for(int i=1;i<=n+1;i++){
		if(a[i]==0){
			continue;
		}
		if(a[i]>0){
			if(i!=1){
				cout<<"+";
			}
			if(a[i]==1){
				if(i==n+1){
					cout<<a[i];
				}
			}else{
				cout<<a[i];
			}
			if(i!=n+1&&i!=n){
				cout<<"x^"<<n-i+1;
			}
			if(i==n){
				cout<<"x"; 
			}
		}else{
			if(a[i]!=-1){
				cout<<a[i];
			}else if(i==n+1){
				cout<<a[i];
			}else{
				cout<<"-";
			}
			if(i!=n+1||i!=n){
				cout<<"x^"<<n-i+1;
			}
			if(i==n){
				cout<<"x"; 
			}
		}
	}
	return 0;
}

感觉自己越写越乱QWQ