In file included from /in/driver/main.cpp:1:0:
/in/shortestP2P.hpp: In member function 'void ShortestP2P::readGraph()':
/in/shortestP2P.hpp:81:29: error: 'change' was not declared in this scope
                             change = true;
                             ^~~~~~
/in/shortestP2P.hpp:81:29: note: suggested alternative: 'clone'
                             change = true;
                             ^~~~~~
                             clone