读程序，写结果（ ）
public class AddTest{
public static void main(String args[]){
int t;
Value2 no=new Value2(10,20);
t=no.x+no.y;
System.out.println(“add=”+t);
}
}
class Value1{
int x,y;
Value1(int a, int b){
x=a+10;
y=b;
}
}
class Value2 extends Value1{
Value2(int a, int b){
super(a,b);
}
}
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