Compilare: user.cpp: In function ‘void dijkstra(int, int)’: user.cpp:34:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<L[p.second].size();i++){ ^ user.cpp:25:20: warning: unused variable ‘j’ [-Wunused-variable] register int i,j; ^ user.cpp: In function ‘int main()’: user.cpp:48:20: warning: unused variable ‘j’ [-Wunused-variable] register int i,j,x,y,c,nodmin; ^ user.cpp:48:28: warning: variable ‘nodmin’ set but not used [-Wunused-but-set-variable] register int i,j,x,y,c,nodmin; ^