求大佬看看，分数是100，但是最后一个点没过

#include <iostream>

using namespace std;
const int N = 110;
int a[N];
int n;

int main()
{
	cin >> n;
	for(int i = n; i >= 0; i--) cin >> a[i];
	for(int i = n; ; i--)
	{
		if(a[i] != 0)
		{
			if(a[i] == -1)
			cout << "-x" << "^" << i;
			else if(a[i] == 1)
			cout << "x" << "^" << i;
			else if(a[i] > 0)
			cout << a[i] << "x" << "^" << i;
			else if(a[i] < 0)
			cout << a[i] << "x" << "^" << i; 
		    break;
		}
	    else
		n--;
	}
	
	for(int j = n - 1; j > 1; j--)
	{
		if(a[j] == 0)
		continue;
		
		if(a[j] == 1)
			cout << "+x" << "^" << j;
		else if(a[j] == -1)
			cout << "-x" << "^" << j;
		else if(a[j] > 0)
			cout << "+" << a[j] << "x" << "^" << j;
		else if(a[j] < 0)
			cout << a[j] << "x" << "^" << j;
	}
	
	if(a[1] == 0) ;
	else if(a[1])
	{
		if(a[1] == -1)
			cout << "-x";
		else if(a[1] == 1)
			cout << "+" << "x" ;
		else if(a[1] > 0)
			cout << "+" << a[1] << "x";
		else if(a[1] < 0)
			cout << a[1] << "x"; 
	}
	
	if(a[0] == 0) ;
	else if(a[0])
	{
		if(a[0] > 0)
		    cout << "+" << a[0];
		else if(a[0] < 0)
		    cout << a[0];
	} 
	return 0;
}