#include <iostream>
using namespace std;

int n;

int main(){
    cin >> n;
    int t;
    bool first = true;
    for (int i = n; i >= 0; i -- ){
        cin >> t;
        if(!t)continue;
        if(!first && t>0)cout << "+";
        else if(t<0)cout << '-';
        if(abs(t) != 1 || !i)cout << abs(t);
        if(i) cout << "x";
        if(i>1)cout <<'^' << i;
        first = false;

    }
}