Compilare: user.cpp: In function ‘int bellmanford()’: user.cpp:24:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<l[nod].size();i++) ^ user.cpp:16:12: warning: unused variable ‘j’ [-Wunused-variable] long i,j,nod; ^ user.cpp: In function ‘int main()’: user.cpp:42:14: warning: unused variable ‘j’ [-Wunused-variable] long m,i,j,x,y; muc aux; ^ user.cpp:42:18: warning: unused variable ‘y’ [-Wunused-variable] long m,i,j,x,y; muc aux; ^ user.cpp:43:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%ld %ld",&n,&m); ^ user.cpp:46:51: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%ld %ld %ld",&x,&aux.dir,&aux.c); ^