Day -N
Six months did not touch OI I finally went back to the familiar and unfamiliar places. Then decadent two days after the preliminary round?
Rp overflowing preliminary exam school first, and then the eggs
Then that is played all over the Fenwick tree template, write hung up (yes I will write now even Fenwick tree hanging)
Look at the mission plan, inexplicable sadness
And then went to the decadent
Day -M
Too decadent like this go on line 8, and began playing on the cattle off
The first day of the first question and the second question both AC Hu mouth, I feel okay, so he play dp topic
Then again write binary apple trees hang
Then learn about the change root method, do a few template title
And brushed up doubling gone
A few days later the cattle off the race simulation are critical zero, only to find themselves dragged down the code power of thinking (thinking six months ago has been a drag force code)
However, progress has been beaten and (think) the pain and happiness, but also persevered
Day 0
Lost his identity card and not any timely go through, to be notified when the day of the exam have to take a temporary ID card, a number of heart Huangde
Fortunately trouble policeman helped me go through the day, CSP2019.rp--;
Mouth ulcers seven long, eat a meal, uncomfortable
It originally planned to fight the board did not play(Although the last was found did not test)
Huangde a number of things to learn almost six months ago lost all
Six months can change a lot, really
Day 1
Up late and have no time to eat breakfast, when to get up
Rushed to the examination room, he was surprised to be told that the examination can not take water? ? ?
However, as long as the matter invigilator will be able to bring in water
Log in early download the paper, the invigilator time card actually do not give your password? ?
Then my computer monitor actually bad? ? ? Front desk will actually move under your butt black? ? ?
Forget it put away mentality ~~~
Under the papers immediately open T1, 2 Fenzhong read the meaning of the questions and then start the simulation, first pass a second time to write a fake(Saying that what stench large sample)
Since the input and output display problems ull tone nearly 30min, not panic, T2 open
T2 out a positive solution, is a sequence done on dp on the trees, and is not finished, with a stack memory matches the left parenthesis, the backtracking stack when reducing about, \ (O (n-) \) to get away
So he wrote fake again, to help monitor lowered 2h (wtcl)
Looks like a greedy + T3 + enumerate the requirements Erase Sequence Topological order? However, the examination did not think topological order, it will not deal with the situation halfway inserted, then abandoned them in favor fight violence
Write violence hang (---- To Be Continued ---->) mentality explosion
Volkswagen said the examination room listening ygt 210 points, I like it more than the general public sub-sub-sub-low 10 points, and the Los Valley heard someone say that the mentality of cattle passenger data explosion fake ...... again
Well regardless of it, the afternoon shopping cards +
I heard that the popularity of the group took the test four of the original title, but I did not get the question face ~~
D1 expected Score: \ (100 + 100 + 0 = 200 \)
Cattle customer self-test: \ (75 + 100 + 175 = 0 \)
Luo Gu self-test: \ (100 + 100 + 200 = 0 \)
Day 2
Up late +1
This is not allowed to bring water, nor delay the password. I do not even display up.
It took 20min after reading problems surface, T3 actually found most to do? ?
Tl, try not dp, and the number of combinations to try to push, 30min to give up, see T3
T3 took nearly 40min to write a part of the chain points + 55 points of one of violence, feel good, look T2
T2-examination I do not know how, but still feel the results of a function of the number of division point has monotonic? ? Then try \ (O (n \ log n ) \) binary + push the answer?
He found himself after writing fake actually wrote a fake algorithm?
After two false written algorithms to give up and go to T1, we found \ (n≤10, m≤3 \) of sub-section can be shaped pressure (Maybe, but the complexity of the energy pressing time constant is too large), this time from the the end of the game only 30min
Write hanging like pressure, GG
The examination room, ygt told me that he had 247 points D2, zz said T2 had 64 points \ (the n-^ {2} \) dp, T3 just think again can lie 75 points, T1 can take the four-dimensional dp 64
Self-test and learned that what I wrote #define int long longwas removed at the time of the withdrawal dev, T3 stuck to 40 minutes
Mentality completely explosion
D2 next test is expected to score: \ (0 + 0 + 55 \)
Luo Gu self-test: \ (0 + 0 + 40 \)
After the self-test is expected to score: \ (0 + 0 + 40 \)