QOJ.ac

QOJ

#	Username	Motto	Solved
1	xiaowuc1	you're a half a world away, but in my mind I whisper every single word you say	1307
2	hos_lyric	$$\left[\frac{x^n}{n!} q^{K-1}\right] \frac{(\mathrm{e}^{rx} - 1) (q + r + \mathrm{e}^{rx} + q \mathrm{e}^{rx} - r \mathrm{e}^{rx} + 1)}{(q + 1) (r - \mathrm{e}^{2rx} + r \mathrm{e}^{2rx} + 1)}$$	1282
3	ucup-team1005	沉舟侧畔千帆过	1035
4	larryzhong		983
5	PetroTarnavskyi	Why haven't you registered at https://algotester.com/en yet? 🤨	807
6	maspy	Universal Cup Upsol部	738
7	Crysfly	我还能为你驻足到何时	710
8	zhouhuanyi		707
9	qiuzx		682
10	PhantomThreshold		669
11	ckiseki	卷不动了	608
12	ucup-team004		580
13	ucup-team2335		561
14	dXqwq	I can see the Light on you, You can see the Right on me	560
15	ucup-team087		556
16	lmq26052003		534
17	grass8cow		526
18	ucup-team1198		515
19	ucup-team1878		486
20	ucup-team052		467
21	SolitaryDream		462
22	ucup-team1209	我不是可爱小青鱼	442
23	ucup-team2880		432
24	275307894a		430
24	ucup-team1004	方队akioi	430
26	ship2077		422
27	LoverInTime	089年的树剖	401
28	ucup-team159		396
29	Kevin5307	$$ \frac{1}{1-x}\sum_{k=1}^\infty\frac{x^k}{1-\frac{x-x^{k+1}}{1-x}} $$	395
30	ucup-team191		382
30	ucup-team987		382
32	flower		377
33	hyforces	永远不够	366
34	ucup-team1134		359
35	ucup-team130		355
36	bachbeo2007		349
37	ucup-team253		341
38	MoRanSky	无论过去不问将来	337
38	ucup-team864		337
40	ucup-team133		333
41	ucup-team3519		317
41	waifuSenpai		317
43	lmeowdn	Even your existence takes the burden off my mind.	316
44	ucup-team138		312
45	hydd	But are we all lost stars trying to light up the dark?	310
46	ucup-team025		305
46	ucup-team112		305
48	Lynkcat		301
49	Sorting	ㅗ오ㅗ	299
50	ezteam1		291
51	ucup-team266		288
52	james1BadCreeper	他明白他明白我给不起	287
53	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
54	ucup-team311		285
55	znstz		282
56	ucup-team216		280
57	AFewSuns	$\displaystyle\sum_{n \geq 0}{(x+y)^n\frac{u^n}{n!}}=\sum_{k \geq 0}\frac{x}{x-kz}(x-kz)^k\frac{u^k}{k!}\sum_{l \geq 0}\frac{(y+kz)^l}{l!}u^l$	269
58	ucup-team134		266
59	ucup-team1525		265
60	ucup-team1447	没队要	260
60	zhaohaikun		260
62	ucup-team122		257
62	ucup-team3215		257
64	ucup-team244		253
65	ucup-team180		252
66	KKT89		250
66	tricyzhkx		250
68	ucup-team2307		247
68	ucup-team2818		247
70	zhoukangyang		241
71	ucup-team267	哈姆。	240
72	Forever_Young		238
72	iee		238
74	He_Ren		237
74	sdoi	$$P_{a_i}(x) = [t^{a_i}]\frac{1}{1-xF(t)}$$	237
76	ucup-team008		228
77	chenxinyang2006		224
78	8BQube		222
79	chenshi		221
79	PlentyOfPenalty	高亮的是我们，我们是青鱼家军！	221
79	ucup-team1123		221
82	karuna		220
82	kevinyang		220
82	ucup-team1293		220
85	ucup-team296		219
86	DaiRuiChen007		218
86	ucup-team173		218
88	ucup-team045		216
89	propane	woshisb	215
89	ucup-team870		215
91	ushg8877		214
92	JohnAlfnov	Qingyu Kedavra !	213
92	repoman	$$\prod_{i=0}^{n-1} (1+q^iz) = \sum_{i=0}^n q^{i(i-1)/2}\binom ni_q z^i$$	213
94	bulijiojiodibuliduo		212
94	ucup-team110		212
96	ucup-team018		211
96	ucup-team228		211
98	Max_s_xaM		204
98	rotcar07		204
100	new_dawn_2		203