Compilare: main.cpp: In function 'void dfs(int)': main.cpp:18:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < edge[nod].size(); i++ ){ ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:56:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < ctc[i].size(); j++, fout << " " ) ~~^~~~~~~~~~~~~~~