Compilare: user.cpp: In function ‘int main()’: user.cpp:47:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nd].size();i++) ^ user.cpp:75:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nd].size();i++) ^ user.cpp:12:8: warning: variable ‘k’ set but not used [-Wunused-but-set-variable] {int n,k,a,b,i; ^ user.cpp:103:6: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<p<<' '; ^