package carousel;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Scanner;

import java.util.StringTokenizer;

public class Carousel {

private static ArrayList<Integer> answers = new ArrayList<>();

private static long pointTotal(){

int startScore = 3;

int mistakePenalty = 3;

long total = 0;

for(int i : answers){

if (i == 1){

total += startScore;

startScore++;

}else {

startScore = (startScore - mistakePenalty < mistakePenalty) ? mistakePenalty : startScore - mistakePenalty;

}

}

return total;

}

public static void main(String[] args) throws IOException {

FileReader file = new FileReader("input.txt");

Scanner sc = new Scanner(file);

while (sc.hasNextLine()){

StringTokenizer st = new StringTokenizer(sc.nextLine(), " ");

while (st.hasMoreTokens()){

answers.add(Integer.valueOf(st.nextToken()));

}

}

answers.remove(0);

long result = pointTotal();

FileWriter out = new FileWriter("output.txt");

out.write(String.valueOf(result));

out.close();

}

}