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Top Rated Accepted
#201: addiyoue
Accepted: : 260
You Know Who
#201: ucup-team1447
Accepted: : 260
没队要
#201: ucup-team3099
Accepted: : 260
#204: He_Ren
Accepted: : 259
#204: hydd
Accepted: : 259
But are we all lost stars trying to light up the dark?
#206: lgvc
Accepted: : 257
#206: NKheyuxiang
Accepted: : 257
#206: ucup-team4527
Accepted: : 257
#206: ucup-team5071
Accepted: : 257
#210: _CLY_
Accepted: : 256
#211: wsc2008
Accepted: : 254
#212: ucup-team6336
Accepted: : 252
#213: ucup-team3515
Accepted: : 251
#214: ucup-team180
Accepted: : 249
#215: IllusionaryDominance
Accepted: : 248
#215: tricyzhkx
Accepted: : 248
#217: ucup-team2307
Accepted: : 247
#218: ucup-team2172
Accepted: : 246
法克皮百吨
#219: 617lyq
Accepted: : 245
#219: ucup-team1293
Accepted: : 245
#221: Misuki
Accepted: : 244
$\mathbb{C}[x]/(x^{2^n} - 1) \cong \mathbb{C}[x]/(x - \omega) \times \mathbb{C}[x]/(x - \omega^2) \times \ldots\times \mathbb{C}[x]/(x - \omega^{2^n})$
#222: 0000pnc
Accepted: : 243
#222: jrjyy
Accepted: : 243
#222: Register
Accepted: : 243
#225: lunchbox
Accepted: : 242
#226: carrotqq
Accepted: : 240
#226: ucup-team7536
Accepted: : 240
#228: ucup-team267
Accepted: : 239
哈姆。
#229: complexor
Accepted: : 238
#229: ucup-team2045
Accepted: : 238
#231: iee
Accepted: : 236
#231: ucup-team3627
Accepted: : 236
#233: ucup-team135
Accepted: : 235
#233: ucup-team3670
Accepted: : 235
#235: ucup-team7345
Accepted: : 233
#235: wsxcb
Accepted: : 233
#237: ucup-team3586
Accepted: : 231
#238: justin_g_20
Accepted: : 230
#238: ucup-team5008
Accepted: : 230
#238: ucup-team5015
Accepted: : 230
#241: hshhh
Accepted: : 228
#241: huaxiamengjin
Accepted: : 228
#241: qzez
Accepted: : 228
对于无向图的情况，基尔霍夫矩阵为 $K=D-A$，其中 $D$ 为度数矩阵，$A$ 为邻接矩阵。树的个数为去掉 $K$ 一行一列的行列式的值。对于外向树，$D$ 为每个点的入边度数和，内向树相反。此时需要去掉根所在行列。BEST 定理：有向欧拉图的欧拉回路个数为：内向树个数乘以 $\prod\limits_{i=1}^{n}deg_i$，其中 $deg_i$ 为 $i$ 号点的度数。
#241: ucup-team1817
Accepted: : 228
#245: cmll02
Accepted: : 227
#245: Larunatrecy
Accepted: : 227
#247: ucup-team7362
Accepted: : 226
#247: ushg8877
Accepted: : 226
#249: ucup-team4269
Accepted: : 225
#250: __jk__
Accepted: : 224
#250: SoyTony
Accepted: : 224
真実はいつもひとつ
#252: DitaMirika
Accepted: : 223
Face the fear,make the future.
#253: 8BQube
Accepted: : 222
#253: std
Accepted: : 222
哼
#255: ucup-team3097
Accepted: : 221
#255: wcyQwQ
Accepted: : 221
#257: makrav
Accepted: : 220
#258: masterhuang
Accepted: : 219
不要逃避自己的命运
#258: ucup-team5984
Accepted: : 219
#258: xlwang
Accepted: : 219
#261: Crying
Accepted: : 218
第五人格。
#261: Whales
Accepted: : 218
#263: cooluo
Accepted: : 217
π⁴+π⁵≈e⁶ | Per Aspera Ad Astra
#263: houzhiyuan
Accepted: : 217
#263: KobicGend
Accepted: : 217
#263: maojun
Accepted: : 217
#263: shinonome_ena
Accepted: : 217
#268: chenshi
Accepted: : 216
#268: jxy2012
Accepted: : 216
#268: ucup-team6927
Accepted: : 216
一切都会逝去，唯有死神永生
#268: ucup-team870
Accepted: : 216
#268: XY_Eleven
Accepted: : 216
#273: ucup-team3862
Accepted: : 215
#274: ucup-team580
Accepted: : 214
#274: ucup-team7545
Accepted: : 214
#276: ucup-team3790
Accepted: : 213
#277: ucup-team7256
Accepted: : 212
#278: Mynoghra
Accepted: : 211
Man! Mophie out! 我们需要更多莫非！
#278: ucup-team228
Accepted: : 211
#278: Wu_Ren
Accepted: : 211
#281: LosMem
Accepted: : 210
#281: yoy68
Accepted: : 210
#281: yzhang
Accepted: : 210
如果结果不如你所愿，就在尘埃落定前奋力一搏
#284: rizynvu
Accepted: : 209
#284: ucup-team3734
Accepted: : 209
#286: superguymj
Accepted: : 208
#287: ucup-team123
Accepted: : 207
#288: CHD
Accepted: : 206
即使雨永不停歇地下，也要在未曾被雨浸透的角落保有属于自己的一小片虹。
#288: nhuang685
Accepted: : 206
#290: ax_by_c
Accepted: : 205
#290: gg_gong
Accepted: : 205
Who am I? Why am I here?
#290: ucup-team4478
Accepted: : 205
#293: Calculatelove
Accepted: : 204
Love all my perfect imperfections.
#293: do_while_true
Accepted: : 204
#293: jimmyywang
Accepted: : 204
#293: Lzy_
Accepted: : 204
#293: yyyyxh
Accepted: : 204
What is OI (O_o)?
#298: ucup-team1565
Accepted: : 203
#299: new_dawn_2
Accepted: : 202
#299: SirTechnical
Accepted: : 202