Compilare: user.cpp: In function ‘int Find(int)’: user.cpp:41:9: warning: unused variable ‘original’ [-Wunused-variable] int original = node; ^ user.cpp: In function ‘void DFS(int, int)’: user.cpp:53:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); ++i){ ^ user.cpp: In function ‘void Solve()’: user.cpp:70:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < start.size(); ++i) ^