Chess board (1)

Consider a chess board with $r$ rows and $c$ columns, where every square contains between 0 and 9 coins. Write a program such that, given a chess board, computes the total number of coins on it.

Input

Input begins with the number of rows $r$ and the number of columns $c$ . Follow $r$ lines, each one with $c$ characters between ‘0’ and ‘9’.

Output

Print the total number of coins on the board.

Problem information

Author: Unknown
Translator: Salvador Roura

Generation: 2026-01-25T11:08:31.860Z