Compilare: user.cpp: In function ‘int farthest(int, int&)’: user.cpp:24:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[node].size(); i++) { ~~^~~~~~~~~~~~~~~~ user.cpp:36:9: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] return last; ^~~~