3704. Count No-Zero Pairs That Sum to N

LeetCodeMathDynamic ProgrammingOpen on judge ↗

A no-zero integer is a positive integer that does not contain the digit 0 in its decimal representation. Given an integer n, count the number of pairs (a, b) where: - a and b are no-zero integers. - a + b = n Return an integer denoting the number of such pairs. Example 1: Input: n = 2 Output: 1 Explanation: The only pair is (1, 1). Example 2: Input: n = 3 Output: 2 Explanation: The

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solution.cppC++17

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