多项式输出

#include<iostream>
using namespace std;

int a[1000];
int n;

int main(){
    cin >> n;
    for (int i = n; i >= 0; --i)cin >> a[i];

    for (int i = n; i > 0; --i){
        if (a[i] == 0)continue;
        else{
            if (a[i] == 1&&i!=n){ cout << "+"; }
            else if (a[i] == -1){ cout << "-"; }
            else if (a[i] > 0&&a[i]!=1){ if(i!=n)cout << "+";cout<< a[i]; }
            else if (a[i] < 0){ cout << a[i]; }
            if(i>=2)cout << "x^" << i;
            else cout << ‘x‘;
        }
    }
    if (a[0] != 0){
        if (a[0]>0)cout << "+";
        cout << a[0];
    }
    cout << endl;
}