QOJ.ac

QOJ

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AFewSuns

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2447

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4

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格言

$\displaystyle\sum_{n \geq 0}{(x+y)^n\frac{u^n}{n!}}=\sum_{k \geq 0}\frac{x}{x-kz}(x-kz)^k\frac{u^k}{k!}\sum_{l \geq 0}\frac{(y+kz)^l}{l!}u^l$

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AC 过的题目:共 268 道题

5559671071411441492172442494644954995526016026036186197857867877888318338368378928958988999059069569599619909959969979991002100310041005116711891193119712121243124912501252128112831359140714321437165217791811183818441845185618781907196320212071215821782213221422672286234823512402242124242425242624862548255525602601260326462709271727232830283428353002302930983307357638163994399840004207421742184232440644274513454946254630464846754758480248084830483248964928499650185019502050245035503650905095517552365256528053385419543954465504551955235530556856575659574057495809626762986299630863096320632563316366638064046413645265026508650965116537654066086626662766286629663066356638664066596661666766686733673667407008717771877206741575197522755975647569760676077613761676467649765077377759776077627763776577667767776877697773777577887855788179887989810981118174817982691066912156144261443521403215292160621608216132161421618216192162121622216252162621627216282162921630216312163221636216482165521674217282173921740217412174321771217762179221793217942179521807218082180921838

尝试过的题目:共 6 道题

62018774411503455507647

命制的题目:共 0 道题

Virtual Participations:共 8 场比赛

NameStart time
Public NOIP Round #1 (Div. 2, 普及)2022-09-16 22:38:13
Public Round #72022-08-06 13:04:14
Public Round #42022-07-21 11:27:51
Public Round #52022-07-07 08:28:02
Public Round #62022-07-07 08:27:55
Public Easy Round #22022-05-06 23:01:42
Public Easy Round #12022-04-23 16:49:42
Public Round #32022-04-14 17:59:57