QOJ.ac

QOJ

#	Username	Motto	Solved
1	hos_lyric	$$\left[\frac{x^n}{n!} q^{K-1}\right] \frac{(\mathrm{e}^{rx} - 1) (q + r + \mathrm{e}^{rx} + q \mathrm{e}^{rx} - r \mathrm{e}^{rx} + 1)}{(q + 1) (r - \mathrm{e}^{2rx} + r \mathrm{e}^{2rx} + 1)}$$	1398
2	xiaowuc1	you're a half a world away, but in my mind I whisper every single word you say	1317
3	ucup-team1005	沉舟侧畔千帆过	1053
4	maspy	Universal Cup Upsol部	990
5	larryzhong		983
6	qiuzx		820
7	PetroTarnavskyi	Why haven't you registered at https://algotester.com/en yet? 🤨	806
8	Crysfly	我还能为你驻足到何时	744
8	zhouhuanyi		744
10	ucup-team004		714
11	PhantomThreshold		668
12	ucup-team087		630
13	dXqwq	I can see the Light on you, You can see the Right on me	610
14	ckiseki	卷不动了	608
15	yellowbird	做满1000题，肝就对了	577
16	ucup-team2335		561
17	grass8cow		560
18	ucup-team1878		559
19	lmq26052003		537
20	ucup-team1198		516
21	ucup-team1004	方队akioi	489
22	275307894a		484
23	ship2077		474
24	ucup-team052		472
25	SolitaryDream		462
26	ucup-team159		455
27	ucup-team1209	我不是可爱小青鱼	442
27	ucup-team987		442
29	ucup-team191		440
30	ucup-team2880		432
31	Kevin5307	$$ \frac{1}{1-x}\sum_{k=1}^\infty\frac{x^k}{1-\frac{x-x^{k+1}}{1-x}} $$	431
32	ucup-team1134		430
33	ucup-team253		411
34	ucup-team130		408
35	LoverInTime	089年的树剖	402
36	SGColin	Love never fails.	383
37	Qiuly	fendou	382
37	ucup-team3519		382
39	flower		377
39	ucup-team133		377
41	hyforces	永远不够	366
42	ucup-team138		365
43	ucup-team025		353
44	bachbeo2007		349
45	ucup-team112		347
45	ucup-team864		347
47	rotcar08		338
48	MoRanSky	无论过去不问将来	337
49	ucup-team134		335
50	ucup-team311		324
51	ezteam1		322
52	ucup-team3215		320
53	lmeowdn	Even your existence takes the burden off my mind.	319
53	ucup-team216		319
55	waifuSenpai		317
56	hydd	But are we all lost stars trying to light up the dark?	310
57	Lynkcat		308
58	ucup-team4645	Altale	307
59	ucup-team4744		306
60	ucup-team2818		305
61	ucup-team266		301
62	KKT89		299
62	Sorting	ㅗ오ㅗ	299
64	rotcar07		298
65	NailongGroup		296
66	propane	woshisb	294
66	ucup-team173		294
68	yhddd		290
69	james1BadCreeper	他明白他明白我给不起	287
70	alpha1022	$$\frac{1}{n_1!n_2!}(1-y)^{n_1+n_2+2} \left(\sum_{j\ge 0} y^j(t+j)^{n_1} \right) \left(\sum_{j\ge 0} y^j((j+1)-t)^{n_2} \right)$$	286
71	znstz		284
72	AFewSuns	$\displaystyle\sum_{n \geq 0}{(x+y)^n\frac{u^n}{n!}}=\sum_{k \geq 0}\frac{x}{x-kz}(x-kz)^k\frac{u^k}{k!}\sum_{l \geq 0}\frac{(y+kz)^l}{l!}u^l$	270
72	DaiRuiChen007		270
74	ucup-team244		268
75	rgnerdplayer		267
76	ucup-team122		266
76	zhaohaikun	Pub AK IOI!	266
78	ucup-team1525		265
79	ucup-team1123		264
80	Forever_Young		263
81	ucup-team008		260
81	ucup-team1447	没队要	260
83	ucup-team296		259
84	PlentyOfPenalty	高亮的是我们，我们是青鱼家军！	258
85	ucup-team180		252
86	tricyzhkx		250
87	ucup-team2307		247
88	ucup-team110		245
89	Register		244
89	zhoukangyang		244
91	kevinyang		243
92	chenxinyang2006		242
92	ucup-team055		242
92	Z_301		242
95	ucup-team267	哈姆。	240
96	ucup-team121		239
97	iee		238
98	He_Ren		237
98	nullptr_qwq		237
98	sdoi	$$P_{a_i}(x) = [t^{a_i}]\frac{1}{1-xF(t)}$$	237