조합

last update: 2021.09.08.WED

2407 조합, Silver 2

Memory 29200KB, Time 68ms


n, m = map(int, input().split())
comb = 1
frag = 1
for i in range(m):
    comb *= (n - i)
    frag *= (i+1)

print(comb//frag)