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