unary_negate example

 int  main()  {
         vector<int>  v;
         for(int  i  =  0;  i  <  10;  ++i)
                 v.push_back(i);
         vector<int>::iterator  vi  =  find_if(
                v.begin(),  v.end(),
                not1(bind2nd(greater<int>(),  5)));
         cout  <<  "Match  found  at  position:  "
                  <<  vi  -  v.begin()  <<  '\n';
 }