LeetCode 961 N-Repeated Element in Size 2N Array 解題報告
題目要求
In a array A of size 2N, there are N+1 unique elements, and exactly one of these elements is repeated N times.
Return the element repeated N times.
題目分析及思路
題目給出一個長度為2N的陣列，其中有N+1個不同元素，有一個元素重複了N次，要求返回該重複N次的元素。可以隨機從陣列中獲得兩個元素，如果這兩個元素相同，則該元素就是題目所要返回的元素。
python程式碼
class Solution:
def repeatedNTimes(self, A):
"""
:type A: List[int]
:rtype: int
"""
while 1:
num = random.sample(A,2)
if num[0]==num[1]:
return num[0]
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