下列程序横线处，应该输入的是
#include<iostream>
using namespace std;
int n, a[10001];
void swap(int & a, int & b)
{
int t = a;
a = b;
b = t;
}
int main()
{
cin >> n;
for (int i = 1; i <= n; i++)
cin >> a[i];
for (int i = n; i > 1; i--)
for (int j = 1; j < i; j++)
if (a[j] > a[j + 1])
______________________;
for (int i = 1; i <= n; i++)
cout << a[i] << " ";
cout << endl;
return 0;
}
