Compilare: user.cpp: In function ‘void precalcCoresp()’: user.cpp:47:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<G[i].size();j++) ^ user.cpp:51:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<G[i].size()) ^ user.cpp:53:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(k<G[i].size() && G[i][j].second==G[i][k].second) ^ user.cpp:59:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j<G[i].size() && G[i][j].second!=G[i][j-1].second) ^ user.cpp: In function ‘void Solve()’: user.cpp:145:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Sol.size();i++) ^