Compilare: user.cpp: In function ‘nod* search(int, nod*)’: user.cpp:38:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<n->nexts.size();i++) ^ user.cpp: In function ‘void addNode(int, int)’: user.cpp:58:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nodes.size();i++) ^ user.cpp:57:10: warning: unused variable ‘t’ [-Wunused-variable] nod* t; ^ user.cpp: In function ‘void show(nod)’: user.cpp:70:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod.nexts.size();i++) ^