n = int(input())
a = list(map(int, input().split()))

if n < 3:
    print(0)
else:
    up = 1
    down = 1
    for i in range(1, n):
        if a[i] > a[i-1]:
            up = down + 1
        elif a[i] < a[i-1]:
            down = up + 1
    max_len = max(up, down)
    print(max_len if max_len >= 3 else 0)