SSOJ2316面积
4049+

## 题目描述

0 0 0 0 0 0 0 0 0 0
0 0 0 0 1 1 1 0 0 0
0 0 0 0 1 0 0 1 0 0
0 0 0 0 0 1 0 0 1 0
0 0 1 0 0 0 1 0 1 0
0 1 0 1 0 1 0 0 1 0
0 1 0 0 1 1 0 1 1 0
0 0 1 0 0 0 0 1 0 0
0 0 0 1 1 1 1 1 0 0
0 0 0 0 0 0 0 0 0 0

## 样例输入

0 0 0 0 0 0 0 0 0 0
0 0 0 0 1 1 1 0 0 0
0 0 0 0 1 0 0 1 0 0
0 0 0 0 0 1 0 0 1 0
0 0 1 0 0 0 1 0 1 0
0 1 0 1 0 1 0 0 1 0
0 1 0 0 1 1 0 1 1 0
0 0 1 0 0 0 0 1 0 0
0 0 0 1 1 1 1 1 0 0
0 0 0 0 0 0 0 0 0 0

## 样例输出

15