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Showing content from https://www.tutorialspoint.com/cpp_standard_library/cpp_set_crbegin.htm below:

C++ Set Library - crbegin Function

It return const_reverse_iterator to reverse beginning.

Following are the ways in which std::set::crbegin works in various C++ versions.

const_reverse_iterator crbegin() const noexcept;

const_reverse_iterator crbegin() const noexcept;

It return const_reverse_iterator to reverse beginning.

It never throws exceptions.

Time complexity is contstant.

The following example shows the usage of std::set::crbegin.

#include <iostream>
#include <set>

int main () {
   std::set<int> myset = {50,40,30,20,10};

   std::cout << "myset backwards:";
   for (auto rit = myset.crbegin(); rit != myset.crend(); ++rit)
      std::cout << ' ' << *rit;

   std::cout << '\n';

   return 0;
}

The above program will compile and execute properly.

myset backwards: 50 40 30 20 10

set.htm

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