Compilare: main.cpp: In function 'void dfs(int)': main.cpp:15:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[i].size();j++) ~^~~~~~~~~~~~ main.cpp: In function 'void drum(int, int)': main.cpp:42:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[i].size();j++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:74:12: warning: array subscript has type 'char' [-Wchar-subscripts] v[x].push_back(y); ^ main.cpp:75:12: warning: array subscript has type 'char' [-Wchar-subscripts] g[y]++; ^