Compilare: user.cpp: In function ‘void dijkstra()’: user.cpp:40:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod_cur].size();i++) ^ user.cpp:33:9: warning: unused variable ‘a’ [-Wunused-variable] nod a; ^ user.cpp: In function ‘void citire()’: user.cpp:20:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.cpp:23:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&x,&y,&z); ^