def main():
    for _ in range(int(input())):
        A, B, C = map(int, input().split())
        if A > C:
            A, C = C, A
        if [A, B, C].count(1) >= 2:
            print(-1)
            continue

        if B > A and B > C:
            if A == C:
                if A == 1:
                    print(-1)
                else:
                    print(1)
            else:
                print(0)
            continue

        if B < A and B < C:
            if A != C:
                print(0)
            elif A - B >= 2:
                print(1)
            elif B == 1:
                print(-1)
            else:
                print(2)
            continue

        if A == B:
            if B == C:
                if B <= 2:
                    print(-1)
                else:
                    print(3)
            else:
                print(1)
            continue

        if B == C:
            if (C-A) >= 2:
                print(1)
            elif A >= 2:
                print(2)
            else:
                print(-1)
            continue

        if A < B:
            if A == 1:
                if B == 2:
                    print(-1)
                else:
                    print(C-B+1)
            elif (B-A) == 1:
                print(2)
            else:
                print(min(B-A+1, C-B+1))


if __name__ == "__main__":
    main()