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public class cis229wk3 {
	 static long gcd(long m, long n) {
		   if (n==0)
		     return m;
		   else
		     return gcd(n, m % n);
	} 

	public static void main(String [] args) {
		System.out.println(gcd(4,8));
		// program returns a 4
	}
}

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import java.util.ArrayList;
import java.lang.*;

public class reverse {
        public static void main (String []args) {
                        ArrayList a= new ArrayList();
                        a.add("entry 0");
                        a.add("entry 1");
                        a.add("entry 2");
                        a.add("entry 3");
                        a.add("entry 4");

                        System.out.println(a);
                        System.out.println(reverse(a));

                }

        public static ArrayList reverse( ArrayList list ) {
           ArrayList store= new ArrayList();
           for (int i = 0; i < list.size(); i++) {
                store.add(list.get(list.size() -1 - i));
           }
        return store;
        }
}