#include <bits/stdc++.h>
using namespace std;
int n,a,n1;
int main(){
	scanf("%d",&n);
	scanf("%d",&n1);
	
	if(n1<0) { printf("-");printf("%d",-n1);printf("x^");printf("%d",n);}
	else if(n1>0) { printf("%d",n1);printf("x^");printf("%d",n);
	} 
	
	for(int i=n-1;i>=1;i--){
		scanf("%d",&a);
		if(a<0) { printf("-");printf("%d",-a);printf("x^");printf("%d",i);}
		else if(a>0) { printf("+");printf("%d",a);printf("x^");printf("%d",i);} 
		
	} 
	
	scanf("%d",&a);
	if(a<0) {printf("-");printf("%d",-a);}
	else if(a>0)  printf("+");printf("%d",a);
	

	return 0;
}