Compilare: user.cpp: In function ‘int dfs(int, int, int)’: user.cpp:46:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Tree[node].size(); i++) ^ user.cpp:52:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Tree[node].size(); i++) ^ user.cpp:64:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Tree[node].size(); i++) ^