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| class Solution:
def numberOfArithmeticSlices(self, nums: List[int]) -> int:
ans = 0
data = []
for i in range(len(nums)-1):
data.append(nums[i+1]-nums[i])
data.append(-3000)
left = data[0]
cnt = 0
for i in data:
if i != left:
cnt = 0
left = i
if i == left:
cnt += 1
if cnt > 1: ans += cnt-1
return ans
|
