#include <fstream>
using namespace std;

int as[9];
    int n;
int steps[11];

    struct zeta
    {
        int st;
        int val;
    };

void mas(int step,zeta param)
{

 if (step<n)
 {
     param.st++;
     mas(step+1,param);
     param.st--;
     param.val*=as[step];
     mas(step+1,param);
 }
 else
 {
     steps[param.st]+=param.val;
 }

}

int main()
{
        ifstream cin;
    ofstream cout;
    cin.open ("input.txt");
    cout.open ("output.txt");
    zeta inic;
    inic.st=0;
    inic.val=1;

for (int i=0;i<=10;i++) steps[i]=0;
    cin >> n;
    for (int i=0;i<n;i++) cin >> as[i];
mas (0,inic);

for (int i=n+1;i>1;i--)
    {
        if (steps[i])
     {
           if (steps[i]==1) cout << "X^" << i ;
          else
              if (steps[i]==-1) cout << "-X^" << i;
              else
           cout << steps[i]<<"*X^" << i;

     }
        if (i>0&&steps[i-1]>0&&i!=n+1) cout << "+";
}
     //if (steps[1]>0) cout << "+";
     if (steps[1])
         if (steps[1]==1)cout <<"X";
         else
         if (steps[1]==-1) cout <<"-X"; else cout <<steps[1]<<"*X";
     if (steps[0]>0) cout << "+";
     if (steps[0]) cout << steps[0];
cin.close();
cout.close();
    return 0;
}