An intuitive conclusion can be drawn from the second question g: when the minimum value is placed in the front and the last position respectively, T(P) is the smallest, then (4,6) is placed in the front and (5,2) is placed in the back, because 4 and 2 are the smallest, and 8 in (1 1, 8) is after 2,4.

"Another solution": It is said that after discussing which b(j) to add to a(i), I can be found that I is not greater than J,