T = int(input())
A = [0]*T
B = [0]*T
C = [0]*T
for i in range(T):
    A[i], B[i], C[i] = map(int, input().split())

inf = 3*10**9
for i in range(T):
    if 0 < A[i] < B[i] and 0 < C[i] < B[i] and A[i] != C[i]:
        print(0)
        continue
    if 0 < B[i] and min(A[i], B[i], C[i]) == B[i] and A[i] != C[i] and B[i] != A[i]:
        print(0)
        continue
    a = max(B[i], C[i])-1
    if a == min(B[i], C[i]):
        a -= 1
    if a <= 0 or B[i] == C[i] or A[i] == min(A[i], B[i], C[i]):
        a = inf
    else:
        a = A[i]-a
    b = min(A[i], C[i])-1
    if b <= 0 or A[i] == C[i]:
        b = inf
    else:
        b = B[i]-b
    c = max(A[i], B[i])-1
    if c == min(A[i], B[i]):
        c -= 1
    if c <= 0 or A[i] == B[i] or C[i] == min(A[i], B[i], C[i]):
        c = inf
    else:
        c = C[i]-c
    ans = min(a, b, c)
    if ans == inf:
        ans = -1
    if A[i] == B[i] and B[i] == C[i] and A[i] > 2:
        ans = 3
    print(ans)