[파이썬] 9184 신나는 함수 실행

def w(a, b, c):
    if a <= 0 or b <= 0 or c <= 0:
        return 1
    if a > 20 or b > 20 or c > 20:
        return w(20, 20, 20)
    if dp[a][b][c]:
        return dp[a][b][c]
    if a < b < c:
        dp[a][b][c] = w(a, b, c - 1) + w(a, b - 1, c - 1) - w(a, b - 1, c)
        return dp[a][b][c]
    dp[a][b][c] = w(a - 1, b, c) + w(a - 1, b - 1, c)\
                  + w(a - 1, b, c - 1) - w(a - 1, b - 1, c - 1)
    return dp[a][b][c]

dp = [[[0] *  21 for _ in range(21)] for _ in range(21)]

while True:
    a, b, c = map(int, input().split())
    if a == b == c == -1:
        break
    print(f'w({a}, {b}, {c}) = {w(a,b,c)}')

dp