import sys

sys.setrecursionlimit(10**6)
int1 = lambda x: int(x)-1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.buffer.readline())
def FI(): return float(sys.stdin.buffer.readline())
def LI(): return list(map(int, sys.stdin.buffer.readline().split()))
def LI1(): return list(map(int1, sys.stdin.buffer.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def BI(): return sys.stdin.buffer.readline().rstrip()
def SI(): return sys.stdin.buffer.readline().rstrip().decode()
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
dij = [(0, 1), (1, 0), (1, 1), (1, -1)]
inf = 10**16
# md = 998244353
md = 10**9+7

for _ in range(II()):
    a, b, c = LI()
    ans = inf
    pre = 0
    if a > c:
        a, c = c, a
    if a == c:
        pre = 1
        a -= 1
    if a == 0:
        print(-1)
        continue
    if a >= 2:
        ans = min(ans, max(0, b-(a-1)))
    if b >= 3:
        ans = min(ans, max(0, a-(b-2))+max(0, c-(b-1)))

    if ans == inf: print(-1)
    else: print(ans+pre)