2019.08.13 [group] NOIP improve analog Group A summary

GG, burst, mentality giant collapse. . .

Venue: \ (20 + 15 + 3 = 38 \)


T1:

Magic Split + inclusion and exclusion?
The Positive Solutions \ (a [i] \) resolved into \ (C [I] * m + P [I] \) .
Can be \ (\ SUM {P [I]} \) % \ (m = n-\) % \ (m \)
\ (\ SUM {P [I]} \) may be larger than \ (m \) , but certainly less than \ (K * (. 1-m) \) ! !
We can enumerate.
Since the composition may directly make some number \ (P [I]> m \) , so we need to inclusion and exclusion.
For each \ (\ {P SUM [I]} \) , we can enumerate a few \ (P [I]> m \) . Then inclusion and exclusion.
Then the rest of the n number of K m can be put into it.


T2:

OJ amazing results even pay 3 times CE.
The result is hit the table to find the law?
Magic recursive enumeration seeking to find success last? !
tql! ! !


T3:

GG,GG


to sum up:

Do not be discouraged, do not give up. . .
When is the question not to press several times (x> 1), otherwise. . .
For this count questions, to seriously consider a bold conjecture, A careful.

Now: \ (100 + 100 + 203 3 = \)

Guess you like

Origin www.cnblogs.com/jz929/p/11348274.html
Recommended