Compilare: main.cpp: In function 'void dfs(int)': main.cpp:23:20: 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:64:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<comp[i].size(); j++){ ~^~~~~~~~~~~~~~~ main.cpp:61:18: warning: 'K' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << K << "\n"; ^~~~