7fed8273b48369f651ed85e740817673f3daa76648b6f3846338ecc4d1805f

7fed8273b48369f651ed84e1448075732d32606a8a818c190ec514ec508edf

확실히 업무 스트레스가 늘어난 게 매우 잘 느껴짐..

Γ(z) = (z-1)!