思路:
一个变量plus记录叠加的数,遇到2就+2
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int next = sc.nextInt();
int score = 0;
int plus = 0;
while(next != 0) {
if(next == 1) {
plus = 0;
score += 1;
}else if(next == 2){
plus += 2;
score += plus;
}
next = sc.nextInt();
}
sc.close();
System.out.println(score);
}
}