№ 817. Основная волна

3625

from itertools import product

alph = '0123456'

count = 0
for val in product(alph, repeat = 5):
    val = "".join(val)
    if (val[0] != '0'
            and val.count('6') == 1
            and all(val[i] != val[i+1] for i in range(4))):
        count += 1

print(count)