Algorithms

Count the Digits 0, 1 and 4

Difficulty

Asked at SIG

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Available in Python and C++. You are solving it in Python. Switch to C++

xxxxx xxxxx xxxxxxx xxxx x xx (x) xx xxxxxxx, xxxxxxx xxxxxxx xxxxx (x xxxxxx xx xxxxxxx x). xxxxx xxx xxxx xx xxx xxx xxxxxx xxxxxxx xxx x x, x x xx x x. xxxxxxxxx xxxxx_xxxxxx_xxx(x) xxxxxxxxx xxxx xxxxx. xxxx xxxxxxxxxx xxxxxx: xx xxxxxxxxxxx xxx xxxxxx (x x xxx x x), xxx xx xxxx xx. xxxxxxxx xxxxx_xxxxxx_xxx(xx) # x # x, x xxx x xxxxxxxxxx xxx xxxxx xxxx; xx xxx xx xxxxxxxxxx xxx xxxx. # x, x, x, x, x, x xxx x xxxxxxxxxx xxxxxxx. xxxxx_xxxxxx_xxx(x) # x (xxx xxxxxx x, xxxxxxx "x") xxxxx_xxxxxx_xxx(xx) # xx # x, x xxx x: x. xxxxx xx xx xx: x xxxx xxxxx xx x xx x xx xx xxxxxxx, # xxx x xxxxx xxxxx xx x, x xx x xx xx. xxxxxxxxxxx (x xx x xx xx^{xx}). xxx xxxxxx xxxxx xxxxx (x^{xx}) xxx xxxxxx (x^{xx}) xxxx xxxxxx (x) xxxx, xx xx xxxxx x xx-xxx xxxxxxx. xxx xxxxxxx xxxxxx xxxx xxxx xxx,xxx xxxxxx xx (x) xx x++ xxx x,xxx xx xxxxxx, xx xx (xx^{xx}). xxxxxxx xxx xxx xxxxxxx xxxx xxx xxxxxx. xx x++ xxxx xxxx xxxxx_xxxxxx_xxx(xxxx xxxx x);

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Language:

count_digits_014

def count_digits_014(n: int) -> int:
    """..."""
    # ...
    pass

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