import java.util.Date;

public class Test {
    public static void main(String[] args) {
        int times = 200000;
        long l1=new Date().getTime();
        StringBuffer c = new StringBuffer("ccc");
        for (int i = 0; i < times; i++) {
            c.append("ccc");
        }
        long l2=new Date().getTime();
        System.out.println(l2-l1);
        times=1000000;
        for (int i = 0; i < times; i++) {
            c.append("ccc");
        }
        long l3=new Date().getTime();
        System.out.println(l3-l2);
    }
}