大佬求调

#include <iostream>
using namespace std;
int n;
int xishu[105];
bool flag = 0;
int main () {
    freopen ("poly.in", "r", stdin);
    freopen ("poly.out", "w", stdout);
    scanf ("%d", &n);
    for (int i = 1; i <= n + 1; i++) {
        scanf ("%d", &xishu[i]);
    }
    for (int i = 1; i <= n + 1; i++) {
        if (xishu[i] == 0) continue;
        if (i != 1 && xishu[i] > 0 && flag) printf ("+");
        if (xishu[i] != 1 && xishu[i] != -1 || i == n + 1) printf ("%d", xishu[i]);
        if (xishu[i] == -1) printf ("-");
        if (i != n + 1) printf ("x"), flag = 1;
        if (i != n + 1 && i != n) printf ("^%d", n + 1 - i);
    }
    return 0;
}