T = int(input())

for _ in range(T):
    A, B, C = map(int, input().split())
    
    if len(set([A, B, C]))==3 and (B==max(A, B, C) or B==min(A, B, C)):
        print(0)
        continue
    
    if (A>B and B>C) or (A>B and B==C):
        A, C = C, A
    
    if A<B and B<C:
        if A==1:
            if B==2:
                print(-1)
            elif B==A+1:
                print(C-(B-2))
            else:
                print(C-(B-1))
        else:
            if B==A+1:
                print(min(B-(A-1), C-(B-2)))
            else:
                print(min(B-(A-1), C-(B-1)))
    elif A==B and B<C:
        if A==1:
            print(-1)
        else:
            print(1)
    elif A==B==C:
        if A<=2:
            print(-1)
        else:
            print(3)
    elif B==max(A, B, C):
        if A==1:
            print(-1)
        else:
            print(1)
    elif B==min(A, B, C):
        if A==2:
            print(-1)
        else:
            if A==B+1:
                print(A-(B-1)+C-(B-2))
            else:
                print(1)