Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:18:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<G[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:57:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<bic.size();i++) ^ user.cpp:59:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<bic[i].size();j++) g<<bic[i][j]<<' '; ^