t = int(input())
for i in range(t):
    a, b, c = map(int, input().split())
    l = [a, b, c]
    if len(set(l)) == 1:
        if a == 1 or a == 2:
            print(-1)
        else:
            print(3)
    elif len(set(l)) == 2:
        print(0)
    else:
        l.sort(reverse=True)
        if a == l[0] and b == l[1] and c == l[2]:
            ans1 = a-b+1
            if b-1 == c:
                if c == 1:
                    ans1 = -1
                else:
                    ans1 += 1
            ans2 = b-c+1
            if c == 1:
                ans2 = -1
            if ans1 == -1 and ans2 == -1:
                print(-1)
            else:
                print(min(ans1, ans2))
        elif a == l[0] and b == l[2] and c == l[1]:
            print(0)
        elif a == l[1] and b == l[0] and c == l[2]:
            print(0)
        elif a == l[1] and b == l[2] and c == l[0]:
            print(0)
        elif a == l[2] and b == l[0] and c == l[1]:
            print(0)
        else:
            a, c = c, a
            ans1 = a-b+1
            if b-1 == c:
                if c == 1:
                    ans1 = -1
                else:
                    ans1 += 1
            ans2 = b-c+1
            if c == 1:
                ans2 = -1
            if ans1 == -1 and ans2 == -1:
                print(-1)
            else:
                print(min(ans1, ans2))