\(\text{CSP-J}\) travel notes
\(\text{Day -INF}\)
The preliminary round was waived and there was no travelogue.
\(\text{Day 0}\)
Kind of panicked, so I opened the game to talk to\(\text{zjx,sym}\) Turn on the dark.
\(\text{Day 1}\)
morning\(6\) Getting out of bed a little after midnight.\(07:20\) It's about time to get to the exam room.
Scribble assembled and went in, feeling less panicked this year as it's mostly about watching the\(\text{NOIP}\) The accomplishments.
After entering the examination room, I found that this test site is really pull, much worse than Zhengda.
\(08:13\) Just sat down on the machine, the computer really pulls and the monitor is not even visible.
\(08:16\) After unlocking the control screen, I found that the desktop did not\(\text{noi}\) folder, and only after asking a number of invigilators did a tech come and fix it, and by this time it was already\(08:28\), but it's good that there's nothing wrong with it.
\(08:40\) It's on.-std=c++14, after typing up a quick read and testing it out, I briefly looked at the questions and realized that they were all so long.
\(08:41\) write out (a prescription, check, invoice etc)\(\text{A}\) question, read the question and found good water.\(3\) Minutes cut out.
\(08:44\) Read on.\(\text{B}\) The question, which was really long, turned out to be a simulation when I read it and realized that it took\(10\) Minutes or so, I think, to cut.
\(08:57\) Checked the first two questions because I wrote them a little fast for fear of making a mistake.
\(08:58\) write out (a prescription, check, invoice etc)\(\text{C}\) questions, read the feeling is not very understanding, and molded a few samples found that it should be constructed questions, it is very good to consider the thing is as far as possible with the number of\(8\), because he needs the most matches, which minimizes the final number of bits.
Then wrote a slight search to validate my idea, and used the search blast to find the\(20\) There was nothing wrong with it, so I started writing.
\(\text{PS:}\) I didn't realize it at the time.\(17\) be200 To special judgment!
\(09:48\) It's about time. It's done.\(\text{C}\) Question, but because there is no large sample, or a little panicked, hand touched a lot of data testing, and found that there is no problem, it is relieved.
\(\text{PS:}\) I can't believe I didn't get this much data from my hand.\(17\) be200! I'm really convinced.
\(10:08\) write out (a prescription, check, invoice etc)\(\text{D}\) The questions felt pretty quick to write, leaving about two hours for the last question.
\(10:13\) After reading the questions, I realized that it doesn't seem to be very easy\(\text{D}\) question, saw that the data range was large, and then I kept thinking about what that data range indicated, and I applied almost every algorithm to it.
I forget when I came up with the graph-theoretic approach, but at the time I never knew how to solve the problem of connecting the edges until the\(11:35\) I still couldn't think of anything, so I had to write about violence, and it seems like I just wrote\(5\text{pts}\) Violence, what a loss.
The time afterward verified the correctness of some of the questions, on checking the\(\text{freopen}\) Had it and submitted it after it was fine.
\(\text{Day 2}\)
No score yet.
Projected:\(100 + 100 + 60 + 5 = 265\)。
That's it, anyway.\(\text{J}\) Group.
\(\text{CSP-S}\) travel notes
\(\text{Day -INF}\)
initial heats of a competition\(68/40.0\)。
\(\text{Day 1}\)
I had chowder for lunch. It's pretty big. It's okay.\(13:55\) Straight into the exam room.
The afternoon machine was a little better than the morning, when I couldn't read the question face and had to put it very large.
\(14:30\) write out (a prescription, check, invoice etc)\(\text{A}\) The questions, still as easy as last year.\(3\) Minute cut and then messed around with some hand pinched data.
\(14:35\) left and right open\(\text{B}\) The question, the question surface is really long, read through the feeling a little difficult, and then look at the part of the score, the special nature of a lot of points ah, then thought of the first special nature of the hand forget.
Then it went ahead and wrote the answer to the first question, which was very well written, and the time complexity seems to be\(O(n \log n)\), can't quite remember.
Then it was time to start writing the second question.\(n \le 20\) Direct violence, then special character\(\text{AB}\) It is also very good to write, is to determine whether there is a car speeding on the line, if so the answer is\(m - 1\); otherwise, it is\(m\)。
special property\(\text{C}\) I had written about sorting the left endpoints and then got hung up, and it was a long time later, so I thought I'd start by partially splitting the last two questions, so I opened the\(\text{C}\) The question is up.
after reading\(\text{C}\) The question was found to be\(\text{DP}\)So I thought I'd start by writing a\(O(n^3)\) (used form a nominal expression)\(\text{DP}\)The result is that it took a long time to adjust even\(O(n^3)\) The didn't even tune out, just gave up and wrote a pop search and ran.
write out (a prescription, check, invoice etc)\(\text{D}\) The question, after reading it I bet it's black, because he's just so counterintuitive with this input format, I've seen so many black questions that look like this\(\dots\) I feel like I can write.\(28\text{pts}\) But there's no time. Write.\(8\text{pts}\) Running away, and it doesn't feel quite right.
look back\(\text{B}\) Questions to discover special properties\(\text{C}\) It should be sorted by right endpoint so it's greedy and quick to write.
\(\text{PS:}\) When I first woke up this morning, it occurred to me that sorting by right endpoints seemed to be the right solution! sorely missed\(20\text{pts}\)。
\(\text{Day 2}\)
Projected:\(100 + [70, 80] + 20 + [0, 8] = [190, 208]\)。
summarize
This time, the hanging score is even worse than last year, summarize the summary, I feel that I put too much pressure on myself, resulting in the field of nervousness and rushed, fortunately, this is the\(\text{CSP}\)。
we\(\text{NOIP}\) Bye!