def makekado(x, y, z):
    ans = 0
    maxxyz = max(x, y, z)
    minxyz = min(x, y, z)
    if x > z:
        x, z = z, x
    
    if x == y and y == z:
        if x >= 3:
            ans = 3
        else:
            ans = -1
    elif x == z:
        if maxxyz == y:
            if x == 1:
                ans = -1
            else:
                ans = 1
            
        if minxyz == y:
            if y == 1:
                if x == 2:
                    ans = -1
                else:
                    ans = 1
    
    
    else:
        if maxxyz == y:
            if y > z:
                ans = 0
            else:
                if y < 3:
                    ans = -1
                else:
                    if y - x == 1:
                        ans = 2
                    else:
                        ans = -1
        
        elif minxyz == y:
            if y < x:
                ans = 0
            else:
                if x == 1:
                    ans = -1
                else:
                    ans = 1
                    
        else:
            if x == 1:
                if y == 2:
                    ans = -1
                else:
                    ans = z - y + 1
            else:
                if y == x + 1:
                    ans = 2
                else:
                    ans = min(y - x, z - y) + 1
    print(ans)
    return


n = int(input())
for i in range(n):
    a, b, c = [ int(v) for v in input().split() ]
    makekado(a, b, c)