1989: A+B for Matrices

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题目描述

This time, you are supposed to find A+B where A and B are two matrices, and then count the number of zero rows and columns.

输入

The input consists of several test cases, each starts with a pair of positive integers M and N (≤10) which are the number of rows and columns of the matrices, respectively. Then 2*M lines follow, each contains N integers in [-100, 100], separated by a space. The first M lines correspond to the elements of A and the second M lines to that of B.

The input is terminated by a zero M and that case must NOT be processed.

输出

For each test case you should output in one line the total number of zero rows and columns of A+B.

样例输入

2 2
1 1
1 1
-1 -1
10 9
2 3
1 2 3
4 5 6
-1 -2 -3
-4 -5 -6
0


样例输出

1
5


提示

1）读入数据（两个矩阵）；

2）对读入的两个矩阵求和，结果存储在另一个矩阵（结果矩阵）中；

3）对结果矩阵进行两次遍历，获得零行和零列的总数。

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