'''
    DS2000
    Spring 2020
    Sample code from class: breaking down a number into 100s digit,
        10s digit, and 1s digit.
        
    January 10, 2020

    Test cases:
    * 167 --> 1, 6, 7
    * 2048 --> 0, 4, 8
    * 123789 --> 7, 8, 9
'''

def main():
    orig = int(input('Enter a non-negative integer\n'))

    # To isolate the hundreds digit:
    #   orig // 100 gives us how many 100-units there are
    #   % 10 helps us with leftover, if the orig was 1000 or higher
    hundreds = (orig // 100) % 10
    print('hundreds =', hundreds)

    # To isolate the tens digit:
    #   orig // 10 gives us how many 10-units there are
    #   % 10 helps us with leftover, if orig is 100 or higher
    tens = (orig // 10) % 10
    print('tens =', tens)

    # Finally, to isolate the ones digit, it's just a simple %10
    ones = orig % 10
    print('ones =', ones)
    
main()