from math import factorial

n = 20

print(int(factorial(2 * n) / (factorial(n) ** 2)))

5e01234774e1aac6f6a5159b58a2b844e7499b3f
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<mask token>
print(int(factorial(2 * n) / factorial(n) ** 2))

<mask token>
n = 20
print(int(factorial(2 * n) / factorial(n) ** 2))

from math import factorial
n = 20
print(int(factorial(2 * n) / factorial(n) ** 2))

from math import factorial

n = 20

print(int(factorial(2 * n) / (factorial(n) ** 2)))
