The first two numbers are greater than the size, greater than the first and less than the last 1
The last two numbers are greater than the first two numbers and less than the last two numbers 1
(At this time, the minimum number is at the end, and then only the first two numbers need to be compared. ) 1 minimum, ranking last.
Compare the first two numbers again, the big one comes first and the small one comes second.
The core idea is the so-called "bubble method", but if you are a senior one, don't emphasize this. Are you interested in Baidu Encyclopedia to see "bubble sorting"
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