Compilare: user.cpp: In function ‘int Read(int&)’: user.cpp:28:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int bellmanford()’: user.cpp:46:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[x].size();i++){ ^ user.cpp: In function ‘int dijk()’: user.cpp:68:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[p.nod].size();i++){ ^