class Solution:
def minimumMountainRemovals(self, nums: List[int]) -> int:
n = len(nums)
pre, suf = [1] * n, [1] * n
for i in range(n):
for j in range(i):
if nums[j] < nums[i]:
pre[i] = max(pre[i], pre[j] + 1)
if nums[n - 1 - i] > nums[n - 1 - j]:
suf[n - 1 - i] = max(suf[n - 1 - i], suf[n - 1 - j] + 1)
return min(n - (pre[i] + suf[i] - 1) for i in range(n) if pre[i] != 1 and suf[i] != 1)