Compilare: main.cpp: In member function 'std::vector<std::vector<int> > ValidArrangements::validArrangement(std::vector<std::vector<int> >&)': main.cpp:367:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 367 | for(int i = 1; i < ans.size(); i ++) { | ~~^~~~~~~~~~~~ main.cpp: In member function 'int Dinic::dfs(int, int)': main.cpp:443:27: 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] 443 | for(; index[node] < adj[node].size(); index[node] ++) {