Polydactyly is a genetic disorder where a human or animal is born with more fingers in the hand or foot than it belongs.
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It can occur in one or both hands or feet.
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The name comes from the Greek poly (many) and dactylos (finger).
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Additional fingers or toes are described as "supernumerary," which means "more than the normal number."
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For this reason, the condition is sometimes called a supernumerary digit.
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The only treatment is surgical, especially when the finger is bothersome and unattractive. If the finger is functional, it is not usually removed.
#医学生Medic[超话]##medicaltalks#

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#pat[超话]# 两数相加
You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list.

You may assume the two numbers do not contain any leading zero, except the number 0 itself.

Example

Input: (2 -> 4 -> 3) + (5 -> 6 -> 4)
Output: 7 -> 0 -> 8
Explanation: 342 + 465 = 807.