Compilare: user.cpp: In function ‘bool cuplaj(const int&)’: user.cpp:18:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[node].size(); i ++) ^ user.cpp:28:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[node].size(); i ++) ^ user.cpp:37:1: warning: control reaches end of non-void function [-Wreturn-type] } ^