DSA Unknown Unknown Unknown Count Zeros In A Sorted Matrix

Count Zeros In A Sorted Matrix

easy

Given a Binary Square Matrix where each row and column of the matrix is sorted in ascending order. Find the total number of Zeros present in the matrix.

Input Format

Input is managed for you

Output Format

Output is managed for you

Constraints

1 &lt;= T &lt;= 50
1 &lt;= M,N &lt;= 1000
0 &lt;= A[i][j] &lt;= 1

Notice

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Example

Input

Output

Count Possible Triangles

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