The C++ function std::vector::back() returns a reference to the last element of the vector.@Algorithm_s1
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The C++ function std::vector::begin() returns a random access iterator pointing to the first element of the vector.@Algorithm_s1
The C++ function std::setiosflags behaves as if member setf were called with mask as argument on the stream on which it is inserted/extracted as a manipulator (it can be inserted/extracted on input streams or output streams).@Algorithm_s1