Compilare: main.cpp: In function 'void bfs(int)': main.cpp:15:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:31:13: warning: unused variable 'j' [-Wunused-variable] int n,i,j,k,l,s,x,y,m; ^ main.cpp:31:15: warning: unused variable 'k' [-Wunused-variable] int n,i,j,k,l,s,x,y,m; ^ main.cpp:31:17: warning: unused variable 'l' [-Wunused-variable] int n,i,j,k,l,s,x,y,m; ^