#744. Matrix: Number of zeros
You are given a matrix of integers. **Number of zeros**.
### Input
The first line has n m (the number of rows and columns), each of the next n lines has m integers.
### Output
The answer.
Examples
Input
3 4 0 -2 0 -1 4 3 4 2 -3 -2 -2 7
Output
2
Input
5 2 5 -1 2 -1 4 9 0 0 6 2
Output
2
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.