Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:20:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[u].size(); ++i){ ^ user.cpp: In function ‘void DFST(int)’: user.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < GT[u].size(); ++i){ ^ user.cpp: In function ‘int main()’: user.cpp:59:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < CTC[i].size(); ++j) ^