Compilare: main.cpp: In function 'void buildMatchingA(int)': main.cpp:16:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for (int i = 0; i < A[node].size(); ++ i) { | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void buildMatchingB(int)': main.cpp:48:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for (int i = 0; i < B[node].size(); ++ i) { | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void DFS(int)': main.cpp:81:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for (int i = 0; i < G[node].size(); ++ i) { | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void isHamiltonianCycle()': main.cpp:97:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 97 | for (int i = 0; i < m.size(); ++ i) | ~~^~~~~~~~~~ main.cpp:101:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 101 | for (int i = 0; i < m.size(); ++ i) { | ~~^~~~~~~~~~ main.cpp:120:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 120 | for (int i = 0; i < e.size(); ++ i) | ~~^~~~~~~~~~