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As a traditional event in the past years, join the IOI 2026 Prediction Game!
比赛排行榜 通过数
#293: SirTechnical
Accepted: : 289
#293: ucup-team5217
Accepted: : 289
#296: addiyoue
Accepted: : 288
You Know Who
#296: JKBoys
Accepted: : 288
#298: specialuser
Accepted: : 286
#299: bamboo123
Accepted: : 282
#299: jiamengtong
Accepted: : 282
#299: rqoi031
Accepted: : 282
#302: yangjiaxi
Accepted: : 281
#303: wrhaco
Accepted: : 280
#303: x3x3
Accepted: : 280
#305: 353cerega
Accepted: : 279
#305: ucup-team1817
Accepted: : 279
#307: ucup-team7961
Accepted: : 277
目标：先刷500题看看实力有没有进步;备忘录：https://contest.ucup.ac/modify_team/ucup-team7961（更新队伍信息）
#308: ucup-team045
Accepted: : 276
#308: ucup-team3099
Accepted: : 276
#308: WeaRD276
Accepted: : 276
#311: ucup-team1525
Accepted: : 273
#312: dxbt
Accepted: : 272
#313: Forever_Young
Accepted: : 271
#313: KevinLikesCoding
Accepted: : 271
$$\pi(n)=\phi\left(n,\pi\left(n^\frac{1}{3}\right)\right)-\pi\left (n^\frac{1}{3} \right ) + 1 - \sum_{p\in \left(n^\frac{1}{3},n^\frac{1}{2} \right] } \pi \left (\frac{n}{p} \right )-\pi(p)+1 $$
#315: AFewSuns
Accepted: : 269
$\displaystyle\sum_{n \geq 0}{(x+y)^n\frac{u^n}{n!}}=\sum_{k \geq 0}\frac{x}{x-kz}(x-kz)^k\frac{u^k}{k!}\sum_{l \geq 0}\frac{(y+kz)^l}{l!}u^l$
#316: tzl_Dedicatus545
Accepted: : 267
忙碌着 无为着 继续
#317: intiger
Accepted: : 266
#317: ucup-team8556
Accepted: : 266
#319: as_lyr
Accepted: : 265
#319: ucup-team122
Accepted: : 265
#319: ucup-team7879
Accepted: : 265
#322: xDarkbluex
Accepted: : 264
#323: sk091204
Accepted: : 263
#324: huaxiamengjin
Accepted: : 262
#324: luanyanjia
Accepted: : 262
#324: ucup-team110
Accepted: : 262
#324: ucup-team7736
Accepted: : 262
#324: XY_Eleven
Accepted: : 262
#329: ChiFAN
Accepted: : 261
你是翅膀也是我肩膀
#329: garam1732
Accepted: : 261
#329: travel
Accepted: : 261
#329: ucup-team6749
Accepted: : 261
#329: Zero_OP
Accepted: : 261
#334: Diaosi
Accepted: : 259
#334: hydd
Accepted: : 259
But are we all lost stars trying to light up the dark?
#334: wcyQwQ
Accepted: : 259
#337: He_Ren
Accepted: : 258
#337: incent
Accepted: : 258
entr inc=incent
#337: sqrtqwq
Accepted: : 258
Alea iacta est!
#337: ucup-team1447
Accepted: : 258
没队要
#337: ucup-team7754
Accepted: : 258
#342: ucup-team4464
Accepted: : 257
#342: ucup-team4527
Accepted: : 257
#342: ucup-team5071
Accepted: : 257
#342: ucup-team7899
Accepted: : 257
#342: ushg8877
Accepted: : 257
#347: ucup-team7183
Accepted: : 255
#348: yangjl
Accepted: : 254
#349: Seniorious
Accepted: : 252
We do not know and will not know
#350: elacient
Accepted: : 251
#350: hshhh
Accepted: : 251
#350: nanika
Accepted: : 251
#353: GotoHiotori
Accepted: : 250
我大概，一辈子也忘不了 CRYCHIC
#353: ucup-team3515
Accepted: : 250
#353: ucup-team7832
Accepted: : 250
#356: IllusionaryDominance
Accepted: : 249
#357: ucup-team180
Accepted: : 248
#358: Francisco_Martin
Accepted: : 247
#358: jqh333
Accepted: : 247
#358: liuziao
Accepted: : 247
#358: sunnygreen
Accepted: : 247
どんな謎でも、はなまる解決！
#358: tricyzhkx
Accepted: : 247
#358: ucup-team2307
Accepted: : 247
#364: 617lyq
Accepted: : 246
#364: Sktn0089
Accepted: : 246
#364: ucup-team2172
Accepted: : 246
法克皮百吨
#367: ucup-team1293
Accepted: : 245
#367: yimuhua
Accepted: : 245
3115201
#369: jrjyy
Accepted: : 243
#369: Register
Accepted: : 243
#369: ucup-team2045
Accepted: : 243
#372: lunchbox
Accepted: : 242
#372: Tianyiwei
Accepted: : 242
#374: Crosselle
Accepted: : 241
#374: nathan4690
Accepted: : 241
#374: std
Accepted: : 241
哼
#374: ucup-team7683
Accepted: : 241
一直游到海水变蓝
#378: carrotqq
Accepted: : 239
#378: ucup-team267
Accepted: : 239
哈姆。
#378: zrczrczrczrc
Accepted: : 239
1
#381: ucup-team7725
Accepted: : 238
#382: lazy1105
Accepted: : 237
ぼっち・ざ・ろっく！
#382: zdczdc
Accepted: : 237
#384: Journey_to_Edge_Ring
Accepted: : 236
ECUST_飞向边界环 (est. 2025)Member:hatertumu1thuguanfu
#384: ucup-team7102
Accepted: : 236
#386: iee
Accepted: : 235
#386: MarSer020
Accepted: : 235
#386: ucup-team135
Accepted: : 235
#389: ETK
Accepted: : 234
「我是星 我愿投身前途未卜的群星，为梦长明。」
#389: RDFZchenyy
Accepted: : 234
悟已往之不谏，知来者之可追。实迷途其未远，觉今是而昨非。
#389: wsxcb
Accepted: : 234
#389: xmdxmdxmd
Accepted: : 234
#393: huangleyi
Accepted: : 233