T = int(input())

for i in range(T):

    A,B,C= map(int,input().split())
    X = 1
    Y = 1
    Z = 1

    if A==B and B==C:

        if A < 3:
            print (-1)
        else:
            print (min(X+Z*2,X*2+Z,Y*2+X,Y*2+Z))

    elif A==B or B==C:
        if B == 1:
            print (-1)
        elif abs(A-C) == 1: #1 2 2 or 2 2 3

            #A=Bにする
            if B==C:
                t = C
                C = A
                A = t
                s = X
                X = Z
                Z = s
            
            
            if min(A,B,C) == 1:
                print (-1)
            elif min(A,B,C) < B: #4 4 3など
                print (min(X*2,Y*2))
            else:
                print (min(X,Y))

        else: #9 9 3

            #A=Bにする
            if B==C:
                t = C
                C = A
                A = t
                s = X
                X = Z
                Z = s
            
            print (X)
            
    elif A == C:
        if A != 1 and B != A-1: #2 3 2
            print (min(X,Z))
        elif A != 1 and B == A-1 and A-2 > 0: #3 2 3
            print (min(X*2,Z*2))
        else:
            print (-1)

    else: #9 2 1

        ans = float("inf")

        if min(A,B,C) == B or max(A,B,C) == B:
            print (0)
        else:
            ans = float("inf")

            if A < C: #A>B>Cにする
                t = C
                C = A
                A = t
                s = X
                X = Z
                Z = s
            
            na = B-1

            if na != C and na > 0:
                ans = min(ans,(A-na)*X)

            nb = C-1
            if nb > 0:
                ans = min(ans,(B-nb)*Y)

            if ans == float("inf"):
                print (-1)
            else:
                print (ans)