Compilare: user.cpp: In function ‘void dijkstra()’: user.cpp:169:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<neighbors[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:36:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&V,&E,&K); ^ user.cpp:40:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&nod); ^ user.cpp:46:48: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&left,&right,&cost); ^