The original problem can be regarded as 1

Deformation to1< = x <; = q ……( 1)

q & lt= x+ 1 & lt； =q*q …………(2)

q * q & lt= x+2 & lt； =q*q*q…………(3)

The first formula is+1, 2 < = x+1<; =q+ 1

And q

Add +2 and 3 to the first formula.

Use the formula q * q

If the second formula is+1, q+ 1

Use the formula q * q

{4} {5} {6} Q in six formulas is greater than or equal to three times.