Time Complexity · #57 · 2026-05-31
What's the Big-O?
Python ·Difficulty 2/3
How to play
Read the code and pick its time complexity from four Big-O choices. Think about loops, recursion, and hidden costs. Press 1–4 or click to answer.
What is the time complexity?
def build_string(n):
s = ''
for i in range(n):
s += str(i)
return s
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Press 1 through 4, or tap a numbered choice, to answer. Back to hub