Compilare: main.cpp: In function 'void dfs(int)': main.cpp:29:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for (int i=0;i<l[nod].size();i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'void drum(int, int)': main.cpp:56:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for (int i=0;i<l[nod].size();i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:81:19: warning: array subscript has type 'char' [-Wchar-subscripts] 81 | l[c1].push_back(c2); | ^~ main.cpp:82:19: warning: array subscript has type 'char' [-Wchar-subscripts] 82 | g[c2]++; | ^~