N=input()
A=map(int,raw_input().split())
dp=[[[None]*N for _ in range(N)] for _ in [0,1]]
for i in range(N):
    dp[0][i][i]=dp[1][i][i]=1
for d in range(1,N):
    for l in range(N-d):
        r=l+d
        if A[l]>=A[r]:
            dp[0][l][r]=dp[0][l][r-1]
        else:
            dp[0][l][r]=max(dp[0][l][r-1],dp[1][l+1][r]+1)
        if A[l]<=A[r]:
            dp[1][l][r]=dp[1][l+1][r]
        else:
            dp[1][l][r]=max(dp[1][l+1][r],dp[0][l][r-1]+1)

print max([dp[0][i][N-1] for i in range(N)]+dp[1][0])