Compilare: main.cpp: In function 'void afis(int, int)': main.cpp:25:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[pos].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'void go_visit(int)': main.cpp:35:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[pos].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:71:13: warning: unused variable 'pos' [-Wunused-variable] int pos=vf[i].f.f; ^~~ main.cpp:73:13: warning: unused variable 'finish' [-Wunused-variable] int finish=vf[i].s.f; ^~~~~~