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Problem
Given a 2D matrix, compute the sum of all its elements.
Input format
Input
input.txt
- First line: Two integers R and C (1 ≤ R, C ≤ 100) - Next R lines: Each with C integers
Output format
Output
output.txt
- A single integer: the sum of all values in the matrix
Example
input
2 3 1 2 3 4 5 6
output
21
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Sample cases (from the problem)
Sample Case 1
Input
2 3 1 2 3 4 5 6
Expected output
21
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