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#include <bits/stdc++.h>
using namespace std;
int main() {
int n,a,i;
cin>>n;
for(i=n; i>=0; i--) {
//倒着输入，便于下面输出x的几次方
cin>>a;
if(a) { //判定a是否为真（即不等于0）
if(i!=n&&a>0) cout<<"+"; //i！=n，第一项不用符号
if(abs(a)>1||i==0) cout<<a;//abs是绝对值函数，最后一项或不是-1或1时输出。
if(a==-1&&i) cout<<"-"; //-1省略1
if(i>1) cout<<"x^"<<i;
if(i==1) cout<<"x"; //指数为1时省略1
}
return 0;
