Compilare: main.cpp: In function 'void print()': main.cpp:34:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < vc.size () && i < vl.size (); i ++) ~~^~~~~~~~~~~~ main.cpp:34:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < vc.size () && i < vl.size (); i ++) ~~^~~~~~~~~~~~ main.cpp:36:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; i < vc.size (); i ++) ~~^~~~~~~~~~~~ main.cpp:38:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; i < vl.size (); i ++) ~~^~~~~~~~~~~~