Compilare: main.cpp: In function 'void dfs(int)': main.cpp:29:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<L[nod].size();i++) { ~^~~~~~~~~~~~~~ main.cpp: In function 'void drum(int, int)': main.cpp:54:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<L[nod].size();i++) { ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:82:12: warning: array subscript has type 'char' [-Wchar-subscripts] L[x].push_back(y); ^ main.cpp:83:13: warning: array subscript has type 'char' [-Wchar-subscripts] gi[y]++; ^