Compilare: user.cpp: In function ‘void getAnswer()’: user.cpp:68:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(G[i].size()<K) ^ user.cpp:74:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[x].size();i++) ^ user.cpp:78:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(G[neighb].size()<K && Use[neighb]==0) ^