QOJ.ac
QOJ
User profile
alpha1022
Rating
1800
Contribution
7
Usergroup
Default
Motto
$$\frac{1}{n_1!n_2!}(1-y)^{n_1+n_2+2} \left(\sum_{j\ge 0} y^j(t+j)^{n_1} \right) \left(\sum_{j\ge 0} y^j((j+1)-t)^{n_2} \right)$$
Rating changes
Accepted problems：331 problems
4512213013814618618724724935340442542642743343944446449549950052560261861962062162262662762866577177578678779290590693594594694995096799099599699910601097109811001141116911781197122512261240125212851359156017691833183818391840190919101996199920082010201220132021202220232024213122082214230723432429243825052506255525602566257625772578257925802586259026762677267826792680271927442836285628662973297629772980298829912999308230843089314932233293329532963299330133043395339735573561356338104047404940604103410541164124412541264127412841294181425943454363439944054424447244764610463046924694478248114822489849464947501350195031503650405048505350665094509850995148516551695187518851895190519151925193519451955196519751985213522552265227523953575360536754025403540654115448544954635504553256265627562856295630563156325633563456355636563756385639564056415642564456835684568556865690582658275829607661586161619461966223622562276228623262996308633363506379650865136537655566537301730273037324739273967397743974417446744874537455745674717496751275137515752176327648764976737677768477627813781478157884796179687972798879937994801380158016808981118196829183518525867087038715871787218757887588768924892589278996899789989000903390911036310364104551078911082112681126913243132451326713268217312174121971
Tried problems：16 problems
5976876977025814311518674387991801782268826903190351324013241
Authored problems：3 problems
| # | Problem Name |
|---|---|
| 1 | Matrix Counting |
| 2 | 又一个欧拉数问题 |
| 3 | 异或和 |
Virtual Participations：6 contests
| Name | Start time |
|---|---|
| 2024 小青鱼训练中心 NOI Training Contest #2: :qingyu5: Contest | 2024-07-08 19:25:31 |
| 2024 小青鱼训练中心 NOI Training Contest #3: Tedious Contest | 2024-07-08 19:23:14 |
| 2024 小青鱼训练中心 NOI Training Contest #1: jqdai Contest | 2024-06-27 07:40:27 |
| Nov 27 Training Contest | 2023-11-27 08:15:32 |
| Oct 10 NOIP Training | 2023-10-11 08:03:27 |
| Aug 31 Training | 2023-08-31 07:06:23 |