T=int(input())

def check(A,B,C):
    if min(A,B,C)<=0:
        return 0
    if A==B or B==C or C==A:
        return 0
    if B==max(A,B,C) or B==min(A,B,C):
        return 1
    return 0

    

for test in range(T):
    A,B,C=map(int,input().split())

    if check(A,B,C)==1:
        print(0)
        continue

    if A==B==C:
        if A>=3:
            print(3)
        else:
            print(-1)
        continue

    ANS=1<<60
    if A>=B and check(B-1,B,C)==1:
        ANS=min(ANS,A-(B-1))

    if A>=C and check(C-1,B,C)==1:
        ANS=min(ANS,A-(C-1))

    if B>=A and check(A,A-1,C)==1:
        ANS=min(ANS,B-(A-1))

    if B>=C and check(A,C-1,C)==1:
        ANS=min(ANS,B-(C-1))

    if C>=A and check(A,B,A-1)==1:
        ANS=min(ANS,C-(A-1))

    if C>=B and check(A,B,B-1)==1:
        ANS=min(ANS,C-(B-1))

    if ANS==1<<60:
        print(-1)
    else:
        print(ANS)