Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:15:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(int i=0; i<vecini[nod].size(); i++) | ~^~~~~~~~~~~~~~~~~~~ main.cpp:39:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for(int i=0; i<sons[1].size(); i++) | ~^~~~~~~~~~~~~~~ main.cpp:57:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for(int i=0; i<sons[0].size(); i++) | ~^~~~~~~~~~~~~~~