t=int(input())
for _ in range(t):
    n=int(input())
    A=list(map(int,input().split()))
    Q=[]
    for i in range(n-1):
        Q.append(int(A[i+1]-A[i]>0))
    if Q[0]==0 and Q[-1]==1:
        cnt=0
        for i in range(len(Q)-1):
            if Q[i]!=Q[i+1]:
                cnt+=1
        if cnt==3:
            print("Yes")
        else:
            print("No")
    else:
        print("No")