def solve():
    N = int(input())
    A = list(map(int, input().split()))
    dif = [0]*(N-1)
    for i in range(N-1):
        dif[i] = A[i+1]-A[i]
    lis = [1]
    ans = 0
    i = 1
    while i<N-1:
        if dif[i]*dif[i-1]>0:
            lis[-1] += 1
        elif dif[i]*dif[i-1]<0:
            lis.append(1)
        else:
            for j in range(len(lis)-1):
                ans = max(ans, min(lis[j],lis[j+1]))
            lis = [1]
            i += 1
        i += 1
    for j in range(len(lis)-1):
        ans = max(ans, min(lis[j],lis[j+1]))
    return ans
print(solve())