for _ in range(int(input())):
    a, b, c = map(int, input().split())
    ans = 0
    if a < c:
        a, c = c, a
    elif a == c:
        ans = 1
        c -= 1
        if c < 1:
            ans = -1
    if ans != -1 and a >= b >= c:
        ans_a = a-b + 1 + (1 if b-1==c else 0)
        if a - ans_a < 1:
            ans_a = -1
        ans_b = b-c + 1
        if b - ans_b < 1:
            ans_b = -1
        if ans_a == -1 and ans_b == -1:
            ans = -1
        elif ans_a != -1 and ans_b != -1:
                ans += min(ans_a, ans_b)
        else:
                ans += max(ans_a, ans_b)
    print(ans)