#752. Rows with a sum greater than 0
How many rows have a sum of elements greater than 0?
### Input
The first line has n m (the number of rows and columns), each of the next n lines has m integers.
### Output
A number.
Examples
Input
5 3 0 -4 15 -2 15 11 -10 -7 9 -9 0 3 -1 4 14
Output
3
Input
2 4 5 13 15 -7 4 -2 -1 4
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.