Compilare: main.cpp: In member function 'void graph::Dfs(int)': main.cpp:30:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for( int i = 0; i < ad[node].size(); ++i ) { | ~~^~~~~~~~~~~~~~~~~ main.cpp: In member function 'void graph::Dfs2(int, int, std::vector<std::vector<int> >&)': main.cpp:41:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for( int i = 0; i < ad[node].size(); ++i ) { | ~~^~~~~~~~~~~~~~~~~ main.cpp: In member function 'void graph::Dfs3(int)': main.cpp:73:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for( int i = 0; i < ad[node].size(); ++i ) { | ~~^~~~~~~~~~~~~~~~~ main.cpp: In member function 'void graph::Dfs4(int, std::vector<int>&)': main.cpp:86:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 86 | for( int i = 0; i < reverseAd[node].size(); ++i ) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'bool graph::isReachable()': main.cpp:110:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 110 | for( int i = 0; i < ad[u].size(); ++i ) { | ~~^~~~~~~~~~~~~~ main.cpp: In member function 'void graph::bfsTraversal(int)': main.cpp:207:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 207 | for( int i = 0; i < ad[u].size(); ++i ) { | ~~^~~~~~~~~~~~~~ main.cpp: In member function 'int graph::maxFlow()': main.cpp:292:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 292 | for( int i = 0; i < ad[N].size(); ++i ) { | ~~^~~~~~~~~~~~~~ main.cpp: In static member function 'static bool graph::HavelHakimiUtillity(std::vector<int>)': main.cpp:322:31: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 322 | if( degree.back() > degree.size() - 1 ) | ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'bool graph::isEulerian()': main.cpp:361:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 361 | for( int i = 0; i < ad.size(); ++i ) | ~~^~~~~~~~~~~ main.cpp: In member function 'std::vector<int> graph::eulerCycle()': main.cpp:391:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 391 | for( int i = 0; i < ad[w].size(); ++i ) | ~~^~~~~~~~~~~~~~ main.cpp:405:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 405 | for( int i = 0; i < ans.size(); ++i ) | ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:417:14: warning: 'n' is used uninitialized in this function [-Wuninitialized] 417 | graph G(n); | ^