Compilare: user.cpp: In function ‘int main()’: user.cpp:34:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a[nod].size(); i++) ^ user.cpp:57:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (rez[nod].size() == var[level]) ^ user.cpp:63:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < trans[nod].size(); i++) ^ user.cpp:47:9: warning: variable ‘lastlevel’ set but not used [-Wunused-but-set-variable] int lastlevel = 0; ^