Switch Break Inside a For Loop

Source: Phước Hưng OJ

Version: Phuoc Hung OJ Extended

Problem Statement

Given n codes in {1,2,3}, add the code value for each of all n codes. A break in a case exits only the switch, never the enclosing for loop.

Input

First n (0<=n<=1000), then exactly n codes 1..3.

Output

Print the total after all n codes.

Subtasks

• Subtask 1 (20%): $0\le n\le 10$; $1\le x_i\le3$.

• Subtask 2 (30%): $0\le n\le 100$; $1\le x_i\le3$.

• Subtask 3 (50%): $0\le n\le 1000$; $1\le x_i\le3$.

Examples

Example 1

Input:

4
1 2 3 2

Output:

8

Explanation:

All codes contribute; a switch break does not stop the for loop. Result: 8.

Example 2

Input:

0

Output:

0

Explanation:

All codes contribute; a switch break does not stop the for loop. Result: 0.

Example 3

Input:

3
2 2 2

Output:

6

Explanation:

All codes contribute; a switch break does not stop the for loop. Result: 6.