Eroare de compilare: main.cpp: In member function 'void Graf::dfs(int, std::vector<int>&)': main.cpp:93:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 93 | for (int i = 0; i < lista[x].size(); i++) { | ~~^~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Graf::bfs()': main.cpp:170:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 170 | for (int i = 0; i < lista[x].size(); i++) { | ~~^~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Graf::dfs_topologic(int, std::vector<int>&, std::vector<int>&)': main.cpp:223:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 223 | for (int i = 0; i < lista[x].size(); i++) { | ~~^~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Graf::HavelHakimi()': main.cpp:297:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 297 | if (fst > v.size()) { break; } | ~~~~^~~~~~~~~~ main.cpp:300:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 300 | for (int i = 0; i < v.size(); i++) { | ~~^~~~~~~~~~ main.cpp: In member function 'void Graf::df(int, std::vector<int>&, std::vector<int>&, std::vector<int>&, std::vector<std::vector<int> >, std::vector<std::vector<int> >&)': main.cpp:350:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 350 | for (int j = 0; j < lista[i].size(); j++) { | ~~^~~~~~~~~~~~~~~~~ main.cpp: In member function 'std::vector<std::vector<int> > Graf::criticalConnections(int, std::vector<std::vector<int> >&)': main.cpp:380:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 380 | for (int i = 0; i < connections.size(); i++) { | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Graf::apm()': main.cpp:480:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<MuchieCost>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 480 | for (int i = 0; i < muchii_arbore.size(); i++) { | ~~^~~~~~~~~~~~~~~~~~~~~~ /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/crt1.o: in function `_start': (.text+0x20): undefined reference to `main' collect2: error: ld returned 1 exit status Non zero exit status: 1