1
class Solution:
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    def minimumNumbers(self, num: int, k: int) -> int:
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        if num == 0:
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            return 0
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        if k == 0:
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            return 1 if num % 10 == 0 else -1
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        for n in range(1, min(num // k, 10) + 1):
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            if (num - n * k) % 10 == 0:
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                return n
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        return -1