N = int(input())
A = list(map(int, input().split()))
if N==1:
  print(1)
  exit()
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
ans2 = N//2
for i in range(0,N,2):
  if i==0:
    if A[i]<A[i+1]:
      ans2 += 1
  elif i==N-1:
    if A[i-1]<A[i]:
      ans2 += 1
  else:
    if A[i-1]<A[i]<A[i+1]:
      ans2 += 1
print(max(ans,ans2))