Compilare: user.cpp: In function ‘int BFS()’: user.cpp:52:41: 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:70:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<G[N].size();i++) ^ user.cpp: In function ‘void DFS1(int)’: user.cpp:99:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<G[p].size();i++) ^ user.cpp: In function ‘void DFS2(int)’: user.cpp:108:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<G[p].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:124:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<ARC.size();i++) ^ user.cpp:129:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<SOL.size();i++) ^