For a natural number, do the following operation: if it is an even number, divide by 2; if it is an odd number, do the following operation for a natural number: if it is an even number, divide by 2; if it is an odd number, add 1. Do this until 1, and the operation stops. Find how many numbers become 1 after 10 operations?

For a natural number, do the following operation: if it is an even number, divide by 2; if it is an odd number, do the following operation for a natural number: if it is an even number, divide by 2; if it is an odd number, add 1. Do this until 1, and the operation stops. Find how many numbers become 1 after 10 operations?

The first step is not subtraction, and subtraction can't be two times in succession. According to the times of subtraction, there are 0 times