Compilare: user.cpp: In function ‘void df(int, int)’: user.cpp:12:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[nod].size();i++){ ^ user.cpp: In function ‘void df1(int, int, int)’: user.cpp:23:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:48:24: warning: too many arguments for format [-Wformat-extra-args] printf("%d\n",sol1,0); ^