Greater than sign (the last digit)+1, less than sign (the last digit)-1.

You can only fill in two types of questions at most.

()n & ltm

x y & gt()

When you encounter the first one, look at the symbol, the less than symbol is less than the symbol (the number behind it)-1, and then use m- 1 to calculate a number, which is the number of () n, that is, () n =? m- 1

For example:

()+6 & lt； 13, 13- 1 = 12, so () +6 = 12, () =6.

()-6 & lt； 13, 13- 1 = 12, so () -6 = 12, () = 18.

16-()& lt； 13, 13- 1 = 12, so 16-() = 12, () =4.

When you meet the second type, look at the symbol, which is greater than the symbol, and greater than the symbol (the number behind it)+1, and then use ()+1 to calculate a number, right? x y？ How much is that? x y =？ ()+ 1

For example:

8+3 & gt； (), 1 1? & gt(), 1 1? =()+ 1,()= 10

8? -3 & gt； ()，5 & gt(),? 5? =()+ 1,()=4