Compilare: main.cpp: In function 'void dfspecial(int, int)': main.cpp:27:19: 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:102:30: warning: 'rj' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<maxi<<" "<<ri<<" "<<rj; ^ main.cpp:102:23: warning: 'ri' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<maxi<<" "<<ri<<" "<<rj; ^~~