Compilare: main.cpp: In function 'int BF(int)': main.cpp:41:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<lista[node].size(); i++) ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:84:9: warning: unused variable 'st' [-Wunused-variable] int st=1,dr=k; ^~ main.cpp:84:14: warning: unused variable 'dr' [-Wunused-variable] int st=1,dr=k; ^~