№23 — #23134

from functools import lru_cache
@lru_cache(None)
def f(a, b):
    if a == b:
        return 1
    if a > b:
        return 0
    return f(a + 3, b) + f(a * 2, b) + f(a + 8, b)
@lru_cache(None)
def f1(a, b):
    if a == 40:
        return 0
    if a == b:
        return 1
    if a > b:
        return 0
    return f1(a + 3, b) + f1(a * 2, b) + f1(a + 8, b)
@lru_cache(None)
def f2(a, b):
    if a == 21:
        return 0
    if a == b:
        return 1
    if a > b:
        return 0
    return f2(a + 3, b) + f2(a * 2, b) + f2(a + 8, b)
print(f(5, 21) * f1(21, 77) + f2(5, 40) * f(40, 77))