You are given positive integers low, high, and k.
A number is beautiful if it meets both of the following conditions:
\n\nk.Return the number of beautiful integers in the range [low, high].
\n
Example 1:
\n\n\nInput: low = 10, high = 20, k = 3\nOutput: 2\nExplanation: There are 2 beautiful integers in the given range: [12,18]. \n- 12 is beautiful because it contains 1 odd digit and 1 even digit, and is divisible by k = 3.\n- 18 is beautiful because it contains 1 odd digit and 1 even digit, and is divisible by k = 3.\nAdditionally we can see that:\n- 16 is not beautiful because it is not divisible by k = 3.\n- 15 is not beautiful because it does not contain equal counts even and odd digits.\nIt can be shown that there are only 2 beautiful integers in the given range.\n\n\n
Example 2:
\n\n\nInput: low = 1, high = 10, k = 1\nOutput: 1\nExplanation: There is 1 beautiful integer in the given range: [10].\n- 10 is beautiful because it contains 1 odd digit and 1 even digit, and is divisible by k = 1.\nIt can be shown that there is only 1 beautiful integer in the given range.\n\n\n
Example 3:
\n\n\nInput: low = 5, high = 5, k = 2\nOutput: 0\nExplanation: There are 0 beautiful integers in the given range.\n- 5 is not beautiful because it is not divisible by k = 2 and it does not contain equal even and odd digits.\n\n\n
\n
Constraints:
\n\n0 < low <= high <= 1090 < k <= 20 f(n) denote number of beautiful integers in the range [1…n] , then the answer is f(r) - f(l-1) .Compiled with clang 11 using the latest C++ 20 standard.
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