def main():
    queries = int(input())
    for _ in range(queries):
        a, b, c = map(int, input().split())
        if a == b == c:
            print(3)
        elif a == b < c or a > b == c:
            print(1)
        elif a == b > c or a < b == c:
            if b == c + 1 or a + 1 == b:
                print(2)
            else:
                print(1)
        elif a < b < c or c < b < a:
            diff = min(abs(b - a), abs(c - b)) + 1
            b -= diff
            print(diff if b > 0 else -1)
        elif max(a, b, c) == b or min(a, b, c) == b:
            print(0)


if __name__ == '__main__':
    main()