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(int)
vector.size()
int
unsigned long
std::size_t
std::pow
pow
To avoid copying of a std::vector
[updated wiki link](https://en.wikipedia.org/wiki/Guard_(computer_science)
Re-raised as an issue.
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This comment is hidden because it contains spoiler information about the solution
An invisible U+00ad character is hidden there as the variable name.
(int)was added to castvector.size()to typeintfromunsigned longorstd::size_t. If you don't add it, there will be compile time warning.std::powis the standard C++ function.powwas derived from C stdlib.To avoid copying of a std::vector
[updated wiki link](https://en.wikipedia.org/wiki/Guard_(computer_science)
Re-raised as an issue.