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