import io, os
input = io.BytesIO(os.read(0,os.fstat(0).st_size)).readline

def kado(x,y,z):
    if x==z:
        return 0
    
    if y<x and y<z:
        return 1
    if y>x and y>z:
        return 1
    return 0
        
T=int(input())
for tests in range(T):
    N=int(input())
    A=list(map(int,input().split()))

    NO=[]
    for i in range(1,N-1):
        if kado(A[i-1],A[i],A[i+1])==0:
            NO.extend([i-3,i-2,i-1,i,i+1,i+2,i+3])

    NO=sorted(set(NO))

    flag=0

    if len(NO)<=500:
        for x in NO:
            if flag==1:
                break
            if x<0 or x>=N:
                continue
            for i in range(N):
                if flag==1:
                    break
                if x==i:
                    continue

                A[x],A[i]=A[i],A[x]

                for a in NO+list(range(x-5,x+6))+list(range(i-5,i+6)):
                    if a<=0 or a>=N-1:
                        continue
                    if kado(A[a-1],A[a],A[a+1])==0:
                        break
                else:
                    print("Yes")
                    flag=1
                    break

                A[x],A[i]=A[i],A[x]

    if flag==0:
        print("No")