Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:23:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[m].size();i++){ ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:47:14: warning: 'mm' may be used uninitialized in this function [-Wmaybe-uninitialized] dfs(mm,0); ^