［AtCoder］ABC-142｜A - Odds of Oddness

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• 🔗ABC-142 A - Odds of Oddness

提出結果

def getInt():
    return int(input())


def main():
    n = getInt()

    l = n // 2
    m = n % 2

    print(l / n if m == 0 else (l + 1) / n)


if __name__ == "__main__":
    main()