题解

#include <iostream>
using namespace std;

int main() {
    int n,a,t=0;
    cin >> n;
    for (int i=0;i<n;i++) {
        cin >> a;
        if (a) cout << a << " ";
        else t++;
    }
    for (int i=1;i<=t;i++) {
        cout << "0 ";
    }
    return 0;
}