Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:25:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[nod].size(); ++i) ~^~~~~~~~~~~~~~ main.cpp:24:9: warning: variable 'ajuns' set but not used [-Wunused-but-set-variable] int ajuns=0; ^~~~~ main.cpp: In function 'int main()': main.cpp:68:17: warning: unused variable 'nod' [-Wunused-variable] int nod=a[i]; ^~~