ccf csp考试201604-1折点计数答案（python实现）

ccf csp考试201604-1折点计数答案（python实现）

n = int(input())
a = list(map(int,input().split()))
num = 0
for i in range(1,len(a)-1):
   if a[i]>a[i-1] and a[i]>a[i+1]:
      num += 1
   elif a[i]<a[i-1] and a[i]<a[i+1]:
      num += 1
print(num)