import sys
input = sys.stdin.readline

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

    ANS=[N-sum(A),N-sum(A)+1]

    for i in range(N+1):
        if i in ANS:
            continue
        else:
            print(i)
            break