多项式输出题解

#include <bits/stdc++.h>
using namespace std;
int n;
int main(){
    cin >> n;
    for(int i = n;i >= 0;i --){
    	int x;
    	cin >> x;
    	if(x != 0){
			if(x > 0 && i != n) cout << "+";
			if(x < 0) cout << "-";
			if(abs(x) != 1 || i == 0) cout << abs(x);
		    if(i > 0) cout << "x";       
			if(i > 1) cout << "^" << i;        
		}
	}
    return 0;
}