n, return the smallest positive integer that is a multiple of both 2 and n.\n\n
Example 1:
\n\n\nInput: n = 5\nOutput: 10\nExplanation: The smallest multiple of both 5 and 2 is 10.\n\n\n
Example 2:
\n\n\nInput: n = 6\nOutput: 6\nExplanation: The smallest multiple of both 6 and 2 is 6. Note that a number is a multiple of itself.\n\n\n
\n
Constraints:
\n\n1 <= n <= 150Compiled with clang 11 using the latest C++ 17 standard.
Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.
Most standard library headers are already included automatically for your convenience.
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