Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:29:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp: In function ‘bool check(int)’: user.cpp:54:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp: In function ‘void BFS(int)’: user.cpp:93:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp:113:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Sol.size();i++) ^