Compilare: main.cpp: In function 'void dfs(int)': main.cpp:35:15: 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:113:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<G[i].size()-1;++j){ ~^~~~~~~~~~~~~~ main.cpp:114:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(w=j+1;w<G[i].size();++w){ ~^~~~~~~~~~~~ main.cpp:148:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[un].size();++i) ~^~~~~~~~~~~~~ main.cpp:151:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i=0;i<G[doi].size();++i) ~^~~~~~~~~~~~~~