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1550 - A+B for Matrices

通过次数

0

提交次数

0

Time Limit : 1 秒 Memory Limit : 32 MB

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.

Input

    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.

<span style="font-size:12.0pt;font-family:&quot;color:#333333;background:white;">&nbsp;&nbsp;&nbsp; The input is terminated by a zero M and that case must NOT be processed.</span> 

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Output

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

Examples

Input Format

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

Output Format

1
5