Compilare: main.cpp: In member function 'void Directed::findCTC()': main.cpp:131:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 131 | for(int i=0;i<sol.size();i++) | ~^~~~~~~~~~~ main.cpp:133:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 133 | for(int j=0;j<sol[i].size();j++) | ~^~~~~~~~~~~~~~