include <bits/stdc++.h>

using namespace std;

int main() {

int n;
cin >> n;
int a;
for (int i = n; i >= 0; i--) {
	cin >> a;
	if (a != 0) {
		if (i != n && a > 0)
			cout << "+";
		if (abs(a) > 1 || i == 0)
			cout << a;
		if (a == -1 && i)
			cout << "-";
		if (i > 1)
			cout << "x^" << i;
		if (i == 1)
			cout << "x";
	}
}
return 0;

}