Sum of All Elements in a Matrix
Read a grid and add up every number in it.
Input format
The first line has two integers R and C. Each of the next R lines has C space-separated integers describing one row of the matrix.
Output format
Print a single integer: the sum of every element in the matrix.
Constraints
- Values fit in a 64-bit signed integer
- Trailing whitespace and a trailing newline are ignored by the judge
Read from stdin, write to stdout. Sample cases below show the exact format.
Sample cases
Example 1
Input
2 2
1 2
3 4Expected output
10Example 2
Input
1 3
5 10 15Expected output
30