#include <iostream>
using namespace std;

int main() {
    int n, v[10001], m, k, x;
    cin >> n;
    for (int i = 1; i <= n; ++i) {
        cin >> v[i];
    }
    cin >> m;
    for (int j = 1; j <= m; ++j) {
        cin >> k;
        if (k == 1) {
            cin >> x;
            ++n;
            v[n] = x;
        }
        if (k == 2) {
        	if(n > 0){
            --n;
        	}
        }
    }
    cout << n << "\n ";
    for (int i = 1; i <= n; ++i) {
        cout << v[i] << " ";
    }
    return 0;
}