std::vector<bool,Allocator>::flip
From cppreference.com
                    
                                        
                    < cpp | container | vector bool
                    
                                                            
                    |   Defined in header  <vector>
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|   void flip();  | 
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Toggles each bool in the vector (replaces with its opposite value).
Parameters
(none)
Return value
(none)
See also
|    access  specified element   (public member function of std::vector<T,Allocator>)  | |
|    toggles the values of bits  (public member function of std::bitset<N>)  |