#include <iostream>
#include <string>

using namespace std;



int main () {
    int a[3]={30,20,10};
    int b[3];

    for (int i=0;i<3;i++) {
        cout << a[i] << endl;
    }

    cout << endl;

    for (int i=2;i>=0;i--) {
        cout << a[i] << endl;
    }

    return 0;
}