Chess board (1) P42280


Statement
 

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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.

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
    C C++ Java Python