Compilare: user.cpp: In function ‘int main()’: user.cpp:30:5: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘void dijkstra()’: user.cpp:69:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<G[vf].size();i++) ^ user.cpp: In function ‘void citire()’: user.cpp:42:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&n,&m); ^ user.cpp:45:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d",&x,&y,&cost); ^