t = int(input())
INF = 10**18
for i in range(t):
    a, b, c = map(int, input().split())
    base = 0
    if a == c:
        if a == 1:
            base = INF
        else:
            a -= 1
            base = 1
    if a > c:
        a, c = c, a
    ans1 = base
    if a < b and c < b:
        pass
    else:
        if b >= 3:
            if a >= b-2 and c >= b-1:
                ans1 += a-(b-2)+c-(b-1)
            else:
                ans1 = INF
        else:
            ans1 = INF
    ans2 = base
    if b < a and b < c:
        ans2 = 0
    else:
        if a >= 2:
            ans2 += b-(a-1)
        else:
            ans2 = INF
    ans = min(ans1, ans2)
    if ans < INF:
        print(ans)
    else:
        print(-1)