문제

풀이

def solution(balls, share):
    n = 1
    m = 1
    bsf = 1
    for i in range(1,balls+1):
        n *=i
        
    for j in range(1,share+1):
        m *=j
    
    for k in range(1,balls-share+1):
        bsf *=k
    
    return n/(bsf*m)