帮帮蒟蒻罢（悲）

#include<bits/stdc++.h>
using namespace std;
long long x,y[1000009],cnt=0,pd0=0;
string k;
int main(){
	cin>>x;
	cnt=x;
	for(int i=0;i<=x;i++){
		cin>>y[i];
	}
	for(int i=0;i<=x;i++){
		if(y[i]==0){
			cnt--;
			continue;
		}
		if(cnt!=x and y[i]>0){
			cout<<"+";
		}
		if(cnt==0){
			cout<<y[i];
		}
		else if(y[i]>0){
			if(y[i]==1 and cnt!=1){
				cout<<"x"<<"^"<<cnt;	
			}
			else if(y[i]==1 and cnt==1){
				cout<<"x";
			}
			else{
				cout<<y[i];
				cout<<"x"<<"^"<<cnt;
			}
		}
		else if(y[i]<0){
			if(y[i]==-1 and cnt!=1){
				cout<<"-"<<"x"<<"^"<<cnt;	
			}
			else if(y[i]==-1 and cnt==1){
				cout<<"-x";
			}
			else{
				cout<<y[i];
				cout<<"x"<<"^"<<cnt;
			}
		}
		cnt--;
	}
	return 0; 
}