import java.util.*;
import java.lang.*;
import java.io.*;

class Main {
    public static void foo(int... a) {
        for (int i = 0; i < a.length; i++) {
            System.out.println(i);
        }
    }
    
    public static void main(String[] args) {
        int[] a = new int[] {1, 2, 3};
        foo(a);
    }
}