Arrangements and Combinations · Basic Rules
Lesson 16
from itertools import product
print(len([s for s in product(range(10), repeat=7) if all(s[i] < s[i + 1] for i in range(6))]))
print(len([s for s in product(range(10), repeat=7) if all(s[i] <= s[i + 1] for i in range(6))]))