practice mode on phones
tap the code to type with your on-screen keyboard. phone runs are practice only — they aren't scored or added to the leaderboard.
def fib(n):
a, b = 0, 1
for _ in range(n):
a, b = b, a + b
return a
practice mode on phones
tap the code to type with your on-screen keyboard. phone runs are practice only — they aren't scored or added to the leaderboard.