
import java.util.Scanner;
public class code1 {
public static void main(String[] args){
Scanner in = new Scanner(System.in);
int i=0;
while(true){
System.out.println("跑四百米");
i++;
System.out.println("口渴吗?");
String answer=in.next();
if(!answer.equals("yes")){
continue;
}else{
break;
}
}
System.out.println("总共跑了"+400*i+"米");
}
}


