N = int(input())
A = list(map(int, input().split()))
ans = (N+1)//2
for i in range(0,N-1,2):
  if i+2<N:
    if A[i]<A[i+1]<A[i+2]:
      ans += 1
  elif A[i]<A[i+1]:
    ans += 1
print(ans)