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songyc macbook 2026-02-24 22:19:44 +09:00
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code_study/Baekjoon/python/3053.py Normal file
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from math import pi as p
R = int(input())
print('\n'.join(map(str,[round(p*R**2,6) if i == 0 else 2*R**2 for i in range(2)])))