Compilare: user.cpp: In function ‘int bfs()’: user.cpp:57:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0 ; j < L[c_nod].size() ; j++ ){ ^ user.cpp: In function ‘void flux()’: user.cpp:74:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0 ; i < L[nd_max].size() ; i++ ){ ^