Compilare: main.cpp: In function 'void BFS(int)': main.cpp:28:25: warning: NULL used in arithmetic [-Wpointer-arith] while(Qu.empty() == NULL) ^~~~ main.cpp:33:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graf[node].size();i++) ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void Read()': main.cpp:16:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&n,&m,&s); ^ main.cpp:19:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&aux1,&aux2); ^