Compilare: main.cpp: In member function 'bool Graf::ciclu_eulerian(std::vector<std::vector<int> >&, std::vector<int>&, std::vector<int>&)': main.cpp:139:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 139 | for (int j = 0; j < vecini[varf2].size(); j++) | ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Graf::solve_ciclu_eulerian(std::ifstream&, std::ofstream&)': main.cpp:176:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 176 | for (int i = 0; i < componente_ciclu_eulerian.size() - 1; i++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'bool Graf::ciclu_eulerian(std::vector<std::vector<int> >&, std::vector<int>&, std::vector<int>&)': main.cpp:123:12: warning: control reaches end of non-void function [-Wreturn-type] 123 | stack<int>st; | ^~