668. Kth Smallest Number in Multiplication Table

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Nearly everyone has used the Multiplication Table. The multiplication table of size m x n is an integer matrix mat where mat[i][j] == i * j (1-indexed). Given three integers m, n, and k, return the kth smallest element in the m x n multiplication table. Example 1: Input: m = 3, n = 3, k = 5 Output: 3 Explanation: The 5th smallest number is 3. Example 2: Input: m = 2, n = 3, k = 6 Output: 6

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solution.cppC++17

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