Compilare: user.cpp: In function ‘void markSim(int, int, bool)’: user.cpp:43:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < G[n1][i].size(); j++) ^ user.cpp:45:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < G[n2][i].size(); k++) ^ user.cpp: In function ‘void Solve()’: user.cpp:59:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < W.size(); i++) ^ user.cpp:60:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < B.size(); j++) ^