T = int(input())
for i in range(T):
    A, B, C = list(map(int, input().split()))
    if A == B == C:
        print(3)
    elif A <= B <= C:
        ba = B - A + 1
        cb = C - B + 1
        if C - cb == A:
            cb += 1
        if B <= ba and C <= cb:
            print(-1)
        elif B <= ba:
            print(cb)
        elif C <= cb:
            print(ba)
        else:
            print(min([ba, cb]))
    elif C <= B <= A:
        bc = B - C + 1
        ab = A - B + 1
        if A - ab == C:
            ab += 1
        if B <= bc and A <= ab:
            print(-1)
        elif B <= bc:
            print(ab)
        elif A <= ab:
            print(bc)
        else:
            print(min([bc, ab]))
    else:
        print(0)