Chess board (1) P42280


Statement
 

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Consider a chess board with rr rows and cc 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 rr and the number of columns cc. Follow rr lines, each one with cc characters between ‘0’ and ‘9’.

Output

Print the total number of coins on the board.

Public test cases

  • Input

    3 4
2735
0479
1508

    Output

    51

  • Input

    1 20
01234567890123456789

    Output

    90

  • Input

    2 1
4
5

    Output

    9
    • Information
    Author
    Salvador Roura
    Language
    English
    Translator
    Salvador Roura
    Original language
    Catalan
    Other languages
    Catalan
    Official solutions
    C++ Java Python
    User solutions
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