import sys
readline=sys.stdin.readline
import numpy as np
t=int(readline())
def myon(a):
    INF=10**9+7
    n=len(a)
    dp=np.zeros(n, np.int32)
    res=np.ones(n, np.int32)
    for c in range(2, n+1):
        nuo=(a[:, None]>(a+dp)[None, :])&np.tri(n, k=-1, dtype=np.bool)
        newdp=np.where(nuo, a[:, None]-a[None, :], INF).min(axis=1)
        add=(newdp<INF)
        if not np.any(add):break
        res+=add
        dp=newdp
    return res
def solve():
    n=int(readline())
    a=np.array(readline().split(), np.int32)
    print(np.max(myon(a)+myon(a[::-1])[::-1])-1)
for _ in range(t):
    solve()