#732. Matrix: Sum of all elements
You are given a matrix of integers. **Sum of all elements**.
### 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
5 5 6 4 0 3 -4 9 -6 9 5 -4 9 1 -5 -2 2 7 -8 3 -2 9 0 4 -4 9 -4
Output
41
Input
4 4 6 7 8 -9 8 -8 -8 -6 8 -4 -2 -9 1 1 -5 -5
Output
-17
💡 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.