import java.util.*;

public class TypeUnsafe {

  public static void main(String[] args) {
    
    List numbers = new ArrayList();
    numbers.add("1");
    numbers.add(2);
    numbers.add("3");

    int total = 0;
    for(int i = 0; i < numbers.size(); i++) {
      total += Integer.parseInt((String) numbers.get(i));
    }
    System.out.println("total = " + total);
  }
}