Cpp

sort( vec.begin(), vec.end() );
vec.erase( unique( vec.begin(), vec.end() ), vec.end() );

sort( vec.begin(), vec.end() );
vec.erase( unique( vec.begin(), vec.end() ), vec.end() );

set<int> s( vec.begin(), vec.end() );
vec.assign( s.begin(), s.end() );

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