Compilare: user.cpp: In function ‘void Solve()’: user.cpp:39:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<G[i].size();j++) ^ user.cpp:41:17: warning: unused variable ‘limit’ [-Wunused-variable] int limit=(i-1)*(i-1); ^ user.cpp:66:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[level].size();i++) ^ user.cpp: In function ‘void Build()’: user.cpp:82:13: warning: unused variable ‘limit’ [-Wunused-variable] int limit=(i-1)*(i-1); ^