Problem:
Score : 300 points

Problem Statement

You are given an array A of length N.
Your task is to divide it into several contiguous subarrays.
Here, all subarrays obtained must be sorted in either non-decreasing or non-increasing order.
At least how many subarrays do you need to divide A into?

Constraints

1 \leq N \leq 10^5

1 \leq A_i \leq 10^9

Each A_i is an integer.

Input

Input is given from Standard Input in the following format:

N
A_1 A_2 ... A_N

Output

Print the minimum possible number of subarrays after division of A.

Sample Input 1

6
1 2 3 2 2 1

Sample Output 1

2

One optimal solution is to divide the array into [1,2,3] and [2,2,1].

Sample Input 2

9
1 2 1 2 1 2 1 2 1

Sample Output 2

5

Sample Input 3

7
1 2 3 2 1 999999999 1000000000

Sample Output 3

3

Solution in PyPy3 (7.3.0) (judge verdict: Wrong Answer)

N=int(input())
A=list(map(int,input().split()))
flag=0
answer=1
if N==1:
    print(1)
else:
    if A[0] < A[1]:
        flag = 1
    else:
        flag = -1
    for n in range(N - 1):
        if flag == 1:
            if A[n] <= A[n + 1]:
                pass
            else:
                flag = 0
                answer += 1
        elif flag == -1:
            if A[n] >= A[n + 1]:
                pass
            else:
                flag = 0
                answer += 1
        else:
            if A[n] == A[n + 1]:
                pass
            elif A[n] < A[n + 1]:
                flag = 1
            else:
                flag = -1
    print(answer)