阅读以下程序 import java.io.* ; public class abc { public static void main(String args[ ]) { int i, s = 0 ; int a[] = { 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120 }; for ( i = 0 ; i if (i % 3 == 0) s += a[i]; System.out.println("s=" + s); } } 请写出该程序的输出结果: