Compilare: user.cpp: In function ‘void DF(int, int)’: user.cpp:18:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<h[k].size (); i++) ^ user.cpp:22:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[nod].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:40:15: warning: unused variable ‘m’ [-Wunused-variable] int i, n, m, x; ^