Compilare: main.cpp: In function 'void bfs(int, int)': main.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graph[nod].size();++i) ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:36:15: warning: unused variable 've' [-Wunused-variable] int n,x,y,ve,nod,mi=N,ma; ^~ main.cpp:36:18: warning: unused variable 'nod' [-Wunused-variable] int n,x,y,ve,nod,mi=N,ma; ^~~