Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:18:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < M[node].size(); i++) ^ user.cpp: In function ‘void DFT(int)’: user.cpp:28:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < T[node].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:56:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < R[i].size(); j++) ^