Compilare: main.cpp: In function 'void DFS(int)': main.cpp:14:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A[u].size();i++){ ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:47:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<MC.size();i++){ ~^~~~~~~~~~ main.cpp:48:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<A[MC[i]].size();j++)E[MC[i]][A[MC[i]][j]]=1; ~^~~~~~~~~~~~~~~~