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In the fourth year, the provincial election was completed , But not so nervous , after all , I'm already a high school student .
<>Day -?
Back from training in Beijing , Sleep at home for a few days and go back to school .
With dcx A set of simulation game, well received （ fog ）.
I went home to sleep after the game .
<>Day -1
I was so nervous at night , I went to the mall with my mother for a while . Listen to music , I feel a little relaxed . The song of the cold bird is so beautiful .
It's a bit hard to think about it , The current policy is complicated , If the provincial election fails this year , One year's hard work is in vain .
<>Day 0
This year's provincial election is in Shimen , It's close to home .
I arrived at the hotel in the evening , I met Mr. McGregor , I had a little chat , I feel so flustered .
The teacher invited me to dinner in the evening , I have no appetite , There were people milking me at dinner , I feel more nervous .dcx It looks more relaxed than me .
Night milk a big data structure tomorrow , So a wave of code zjoi R2T2, own yy It's a wonderful one log practice , Yes 6 individual k, But write + It took less than half a year 1h, Feel starfish .
I can't sleep at night , Toss and turn until two o'clock in the morning . I fell asleep in a daze , I had a nightmare .
<>Day 1
I was pulled up by my parents in the morning , I'm in good spirits , Maybe it's the adrenaline that's so exciting .
I always feel sick at breakfast , After a little porridge, I went to the exam .
As planned , After playing, I wrote down the notes on the draft paper , I hope I can get less points . Especially remind yourself to check the space limit and debug statements , I've suffered a lot from this before .
8:10 Fen finally issued the password . Get the question and finish the four questions in a hurry , The first reaction will only be T4. I feel like it's over .
Take a look at the notes , Calm down and read the question for a while , About four questions have ideas , The key is which question to start with ?
feel T1 such FWT I'm tired of counting , But it looks the shortest , Force yourself to write . Actually, it's very fast ,9:00 I'll finish the tune .
I took a little breath at this time , Other topics seem to have a lot of code .
At this time , Maybe it was yesterday 6k 1h It gave me confidence , My hand speed has reached the peak of history .
T2 It's very similar to the original question in the mock up , But it's disgusting , The discussion should be classified after the point is reduced , In one case, you need to maintain a tree array .
T3 It looks very small , Fortunately, the virtual tree used was only written yesterday .
result , I use it 1h Finished two 4k topic . I couldn't believe myself at this time .
There's only one left T4 It's over , It looks very casual , Is it OK to write an upper and lower bound minimum cost flow .
It will be finished soon , The first example is over , The second example ... Get stuck .
what? What do you think is wrong , Draw the picture by yourself , We found a negative ring ! What I write is standard EK Cost flow , We can't handle the negative loop at all .
I'm in a panic at this time , I feel like I can't help it . Or did the notes written before the exam work , Tell yourself by force “ chill ”, Go out to the bathroom .
I remember on the way sk I was told a question before , How to deal with the negative loop of that problem ? It seems that the negative side is full of flow , Then deal with the traffic restrictions . But this problem is the upper and lower bounds to build a map , Can you do the same ? It doesn't matter , Do it by force .
come back , Magic changed the map , Examples ... It's over ! At this time 10:30 What does it look like .
Am I ...AK GDOI It's over ?
I feel very flustered , last 1.5h Four questions about crazy shooting ,T3 Write and hang a place , It's changed, it's over shot . last 20min I'm in a panic , Carefully examined a wave of memory and file names , Also let the staff to check the file read and write .
I took a look , Four questions add up 13k, It's estimated that there will be 20k It's over .
I came out to see teacher Zuo , Tell him I might AK It's over , He said he was shocked . hear T4 The positive solution of is acyclic , The doubt is gone . Again T2 I can write and hang , It feels cool .
Asked a circle , Generally speaking, the score is not high , seemingly 200+ It's a high score . Suddenly I feel cold , I feel like vomiting , Can't eat , We have to go back to the hotel first .
Fidgeting in the room , I feel more and more nervous , I asked the senior about it , hear T2 It's over , I feel a little relieved . After all, where are the league points , As long as you don't miss two questions , Should still be able to get into the team .
Wait for the comments , I talked with my classmates , I'm told I am rk1, But no AK. The feeling is T4 It's not true , I've had a flurry ,“ So the only way to do this is to 50 branch ”. It turned out to be a look at the score , find AK It's over ???
dcxT2 I don't know why RE become 40 branch , however T4 I'll take it 90 branch , I don't think it's stable enough .
In the evening, the teacher invited me to dinner again , I will go back to the hotel after eating , I made up for Miss Hui Yeda .
<>Day2
Still can't sleep , I woke up at four in the morning , After a long time, I fell asleep again .
I feel a little dizzy when I get up in the morning , But tell yourself there's only one , Focus. It's back on the court .
Today, continue to write the notes on paper before the exam . Think that the examination questions , So I wrote a letter first SA board . I'm going to write again NTT board , Half way to the exam .
Get the title ,T1 It seems to be Lucas theorem ?T3 It's a string question , I can do it (flag)!T2 It's computational geometry , Jump first ,T4 It seems to be very troublesome GDOI Traditional defense AK topic , I don't want to write at all .
So I did it for a long time T3, Or only O ( n n l o g 2 n ) O(n\sqrt n log^2n) O(nn log2n)
How to do it , You can get it ... Violence score .
It feels like this is going to end , I changed it T1, I guess a conclusion , It's wrong to use violence . Calm analysis of a wave , find ( n m ) n \choose m (mn) in p p p
That's the number m m m and n − m n-m n−m stay p p p
Carry times of addition in base （ It's called Kummer's theorem ）, So direct digital dp It's done . By this time it was already 9:00 It's over .
I watched it for a while T3, can't , We can only look back T2.T2 It seems to be a minimum pressure after covering the circle dp, But in the back dp Only O ( 2 n ∗ n 2 ) O(2^n*n^2) O(2n∗n
2) Of , only 70 branch . After thinking for a long time, I decided to write , And I found that because n n n It's very small , Minimum circle coverage is not required , Just direct violence . I finished the tune for a while, and then I finished , But the sample is rather weak , I don't think it's very good .
I watched it for a while T3, Or not , Two violent people are going to leave . Look at it again T4, All of a sudden, there was a flash of inspiration , It's hard to write tree sections , Then change to LCT It seems simple ! Start writing as fast as you can , It took less than a year 40min Just finish it + It's over , I couldn't believe it when I passed the detailed example .
And then there's more 1h A little more ,T3 Wrote a naked violence and came back to shoot . find T2 The limit data only ran 0.3s, So it seems that T2 I can make it .
last 20min Keep checking ,T3 A wave of faith , Changed the violent magic a little bit （ It proved useless after the game ）.
Came out and asked a wave , I feel steady in the team , As for the ranking, it depends on whether there is a problem .
Wait for the comments , Insider disclosure T2 A lot of front row players are hot 0 It's over . So I feel like I'm getting the score -100pts.
In the end, I didn't hang up , therefore 330pts again rk1.
Provincial team list , Five men from No.2 Middle school enter the team , I ,zjt,yww,dcx And the women's team dyh It's all in .
So that's the captain ? It doesn't feel real , But anyway , Another year NOI coming . This year is finally a high school student , that , Let's have a fight . Anyway , At least prove that I tried ! July , Guanger , Meet you again .
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