import sys
input = sys.stdin.readline
from operator import itemgetter

T=int(input())

for tests in range(T):
    N=int(input())
    P=list(map(int,input().split()))

    P_INV=[-1]*N

    for i in range(N):
        P_INV[P[i]-1]=i

    ANS=1
    A=[1]*N
    LANS=1

    for i in range(N):
        x=P_INV[i]

        now=0
        if x>0 and A[x-1]!=A[x]:
            now+=1
        if x<N-1 and A[x+1]!=A[x]:
            now+=1

        A[x]=0
        now2=0

        if x>0 and A[x-1]!=A[x]:
            now2+=1
        if x<N-1 and A[x+1]!=A[x]:
            now2+=1

        ANS+=now2-now
        LANS=max(LANS,ANS)

    print(LANS)