i a1 a3 a4 f a2 Flow_CpfMinCad_1 Flow_CpfMinCad_1 Flow_CpfMinCad_2 Flow_CpfMinCad_2 Flow_CpfMinCad_3 Flow_CpfMinCad_3 Flow_CpfMinCad_4 Flow_CpfMinCad_4 Flow_CpfMinCad_5 Flow_CpfMinCad_5