QOJ.ac

QOJ

#	Username	Motto	Solved
1	hos_lyric	$$\left[\frac{x^n}{n!} q^{K-1}\right] \frac{(\mathrm{e}^{rx} - 1) (q + r + \mathrm{e}^{rx} + q \mathrm{e}^{rx} - r \mathrm{e}^{rx} + 1)}{(q + 1) (r - \mathrm{e}^{2rx} + r \mathrm{e}^{2rx} + 1)}$$	1058
2	larryzhong		983
3	PetroTarnavskyi	Why haven't you registered at https://algotester.com/en yet? 🤨	651
4	ucup-team1005	大家好，我是 C++ 高手，今天来点大家想看的东西。$$ \begin{aligned} &\texttt{sort(Ring.begin(), Ring.end());} \\ &\texttt{sort(Chain.begin(), Chain.begin(), [](int x, int y) \{return x > y;\});} \end{aligned}$$	638
5	zhouhuanyi		613
6	ckiseki	卷不动了	609
7	Crysfly	加训	597
8	xiaowuc1	you're a half a world away, but in my mind I whisper every single word you say	532
9	dXqwq	To the cosmic	524
10	ucup-team2335		505
11	lmq26052003		504
12	PhantomThreshold		488
13	SolitaryDream		462
14	ucup-team1209	我不是可爱小青鱼	442
15	grass8cow		427
16	ucup-team087		425
17	ucup-team004		420
18	LoverInTime	089年的树剖	401
19	ucup-team2880		396
20	ucup-team1198		384
21	flower		380
22	maspy	Universal Cup Upsol部	366
23	ucup-team1878		338
24	MoRanSky	无论过去不问将来	333
25	275307894a		330
26	qiuzx		311
27	hydd	Qingyu txdy $\\$ If my armor breaks, I'll fuse it back together	310
27	waifuSenpai		310
29	Kevin5307	$$ \frac{1}{1-x}\sum_{k=1}^\infty\frac{x^k}{1-\frac{x-x^{k+1}}{1-x}} $$	309
30	ucup-team987		301
31	Sorting	ㅗ오ㅗ	293
32	lmeowdn		292
32	ucup-team864		292
34	hyforces	永远不够	291
35	Lynkcat		290
36	ucup-team191		287
37	ucup-team266		280
37	znstz		280
39	ucup-team133		270
40	alpha1022	$$\frac{1}{n_1!n_2!}(1-y)^{n_1+n_2+2} \left(\sum_{j\ge 0} y^j(t+j)^{n_1} \right) \left(\sum_{j\ge 0} y^j((j+1)-t)^{n_2} \right)$$	269
41	AFewSuns	$\displaystyle\sum_{n \geq 0}{(x+y)^n\frac{u^n}{n!}}=\sum_{k \geq 0}\frac{x}{x-kz}(x-kz)^k\frac{u^k}{k!}\sum_{l \geq 0}\frac{(y+kz)^l}{l!}u^l$	266
42	ezteam1		265
42	ucup-team1004	方队akioi	265
44	bachbeo2007		264
44	ucup-team1134		264
46	ucup-team159		261
47	james1BadCreeper	他明白他明白我给不起	256
48	tricyzhkx		249
48	ucup-team1447	没队要	249
50	zhaohaikun		246
51	ucup-team253		243
52	ucup-team267	哈姆。	241
53	sdoi	$$P_{a_i}(x) = [t^{a_i}]\frac{1}{1-xF(t)}$$	237
54	He_Ren		236
54	ucup-team134		236
56	KKT89		233
56	ucup-team112		233
56	ucup-team130		233
59	iee		232
60	ucup-team122		229
61	ucup-team138		228
62	ucup-team025		227
63	ucup-team180		226
64	8BQube		222
65	chenshi		218
66	repoman	$$\prod_{i=0}^{n-1} (1+q^iz) = \sum_{i=0}^n q^{i(i-1)/2}\binom ni_q z^i$$	215
66	ucup-team052		215
66	ushg8877		215
69	ucup-team216		214
69	zhoukangyang		214
71	ucup-team1293		213
72	ucup-team228		212
73	ucup-team870		210
74	new_dawn_2		203
75	ucup-team123		202
76	karuna		201
76	kevinyang		201
78	qwq	$\displaystyle \sum_{i=1}^n [i,i+1,\cdots, i+k] \pmod{10^9+7}$	199
78	ucup-team1126		199
80	ucup-team029		197
81	ucup-team1191		196
82	Wu_Ren		194
83	ship2077		193
83	ucup-team244		193
85	do_while_true		191
86	ucup-team3215		190
87	DitaMirika		189
88	ucup-team026		188
88	ucup-team1055		188
90	JohnAlfnov	Qingyu Kedavra !	186
91	myee	与其诺诺以顺，不若谔谔以昌	184
92	_map_	map<problem_statement,vector<pair<oj,problem_id>>>	179
92	ucup-team311		179
94	bulijiojiodibuliduo		178
94	ucup-team045		178
96	feecle6418	gyh ak ioi	177
97	chenxinyang2006		172
98	mendicillin2		171
99	eyiigjkn		170
100	ucup-team173		167