After two tests, through deep reflection, I found the following major pitfalls:
1. Over the pursuit of speed to do the subject, resulting in several wrong hands at the wrong code appears phenomenon! Also, do not go too fast, convenience to copy and paste, very easy to make mistakes! (E.g., T3-party prior to directly copy the code and forget "<" to "=", and the light for a long time to find the error, ╮ (╯ ▽ ╰) ╭ )
2. The knowledge learned can be applied flexibly.
l T3-party in this question in fact, you can get 70 with floyed divided! But has chosen to try to Dijkstra's algorithm is not too sure, but also forget how the queue is defined!
l T4-tree actually not difficult, but to see a title so long, heart immediately panicked, actually and initially written in less skilled hands! Do you feel when the subject of a blank mind, learned forgot all about it! (╥╯ ^ ╰╥)
3. Not seriously examine the topic.
l In T1-knight output of solving the problem clearly wrote "From the bottom of the search," I actually saw a long time thought out yourself why is it wrong!
In the T2-Beautiful l There is no careful analysis of the topic, read, read, forget the "strong" and "beautiful" needs to rise at the same time, not equal!
l T3-party code are found finished requirements of the subject is "path back and forth", but also a waste of time and for a few methods rewritten several times!
l T4-tree first thought is to determine whether a given tree is symmetrical binary tree, then Luanxiang a pass, but also think of what preorder ah what, I feel after she had found out that the idea Made topic is to ask "to the maximum number of nodes given symmetrical two forks tree tree "! ! It really is a waste of time! And all of a sudden my train of thought!
4. I feel very calm!
l In T1-knight in as they have not seen is how output has been incremental to the horse's action so confused by it was diverted for a long time, palms are sweating, write on paper several times, but in fact, as long as static the mind to think quickly written.
l T4-tree, too, in fact, if good think can think of looking under the law of recursion.
5. Beat code template is not enough skilled. To fight Code, it is often forgotten template.
l read a little into the optimization of T4-tree are wrong! The "||" play into "&&", tune for a long time did not see it!
l to T3-party, for example, is obviously a very simple shortest path algorithm, but always less played some key statements (for example, not the head of the queue of the team labeled as false, not to determine whether the current search labeled ...... )
6. Time control is not in place. In doing question did not control the time, a few questions before commissioning modifications spent a lot of time, resulting in the time left to the last question is running out, do not waste time! Therefore, the accuracy of keyboard familiarity, and many also need to improve and strengthen ah!
In short, we must strive to not make the same mistake next time!