QOJ.ac
QOJ
積分榜 > 通過數
#491: zr
Accepted: : 235
#495: ETK
Accepted: : 234
「我是星 我愿投身前途未卜的群星，为梦长明。」
#495: ucup-team8683
Accepted: : 234
#495: wsxcb
Accepted: : 234
#495: xmdxmdxmd
Accepted: : 234
#499: cbant15
Accepted: : 233
#499: ucup-team6977
Accepted: : 233
#499: UESTC_MatchaParfait
Accepted: : 233
#502: Prime
Accepted: : 232
#502: ucup-team4269
Accepted: : 232
#502: zhenghanyun
Accepted: : 232
#505: 2021cyq
Accepted: : 231
#505: lsj2009
Accepted: : 231
#505: moriko
Accepted: : 231
#505: Nanako7_ix
Accepted: : 231
#505: ucup-team6748
Accepted: : 231
#505: ucup-team8618
Accepted: : 231
#511: rainygame
Accepted: : 230
#511: ucup-team3586
Accepted: : 230
#511: ucup-team5008
Accepted: : 230
#511: ucup-team7697
Accepted: : 230
#515: MatrixGroup
Accepted: : 229
どうか どうか どうか | 可是真实的人生，必定是单调、残酷，而缺乏色彩的
#515: ucup-team5984
Accepted: : 229
#517: Calculatelove
Accepted: : 228
Love all my perfect imperfections.
#517: gmroh
Accepted: : 228
#517: kjhhjki
Accepted: : 228
#517: 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。
#517: Wansur
Accepted: : 228
#522: cmll02
Accepted: : 227
#522: do_while_true
Accepted: : 227
#522: KnownError_
Accepted: : 227
#522: ucup-team2262
Accepted: : 227
#522: ZnPdCo
Accepted: : 227
#527: feecle6418
Accepted: : 226
gyh ak ioi
#527: ucup-team6634
Accepted: : 226
#529: andreyDagger
Accepted: : 225
#529: asdfsdf
Accepted: : 225
#529: chenshi
Accepted: : 225
#529: monirr
Accepted: : 225
#529: zzzYheng
Accepted: : 225
你好我的朋友
#534: TheBlackFire
Accepted: : 224
#534: ucup-team7532
Accepted: : 224
#534: ucup-team7678
Accepted: : 224
#537: 8BQube
Accepted: : 223
#537: ucup-team2819
Accepted: : 223
#539: SoyTony
Accepted: : 222
真実はいつもひとつ
#539: ucup-team7411
Accepted: : 222
#539: ucup-team968
Accepted: : 222
#542: Lenisel
Accepted: : 221
#542: msk_sama
Accepted: : 221
#544: Arkweedy
Accepted: : 220
#544: Survivor_winner
Accepted: : 220
$$|\mathcal F^\downarrow||\mathcal G^\uparrow|\ge 2^n|\mathcal F^\downarrow\cap \mathcal G^\uparrow|$$
#544: treks
Accepted: : 220
#544: vlomaczk
Accepted: : 220
#544: xlwang
Accepted: : 220
#549: houzhiyuan
Accepted: : 219
#549: masterhuang
Accepted: : 219
不要逃避自己的命运
#549: ucup-team4478
Accepted: : 219
#552: rui_er
Accepted: : 218
可爱
#552: tttfred
Accepted: : 218
#554: alex9801
Accepted: : 217
#554: fast_photon
Accepted: : 217
#554: shinonome_ena
Accepted: : 217
#554: ucup-team5656
Accepted: : 217
有点小幽默
#554: yoy68
Accepted: : 217
#559: annyeong1
Accepted: : 216
#559: Thuw
Accepted: : 216
#559: ucup-team7774
Accepted: : 216
#562: chenyx
Accepted: : 215
#562: IvanZhang2009
Accepted: : 215
#562: jxy2012
Accepted: : 215
#562: NineSuns
Accepted: : 215
#562: rhineofts
Accepted: : 215
#562: ucup-team3862
Accepted: : 215
#562: ucup-team6852
Accepted: : 215
#562: ucup-team870
Accepted: : 215
#570: frankly6
Accepted: : 214
#570: gg_gong
Accepted: : 214
Who am I? Why am I here?
#570: haze
Accepted: : 214
爱在一起或死在一起，舍此别无他途。
#570: infCraft
Accepted: : 214
#570: liangbowen
Accepted: : 214
#570: StefanSebez
Accepted: : 214
#570: ucup-team580
Accepted: : 214
#570: ucup-team7582
Accepted: : 214
#578: ucup-team3790
Accepted: : 213
#578: ucup-team8660
Accepted: : 213
#578: ucup-team8977
Accepted: : 213
#581: diandian2020
Accepted: : 212
#581: sherman2022
Accepted: : 212
#581: ucup-team4938
Accepted: : 212
乌龟风扇俱乐部
#581: yuanshengnb
Accepted: : 212
#585: Lzy_
Accepted: : 211
#585: pk661
Accepted: : 211
#585: ucup-team3966
Accepted: : 211
$$\underline{洹}我\underline{达}美\underline{乐}$$
#585: ucup-team8878
Accepted: : 211
#585: Wu_Ren
Accepted: : 211
#590: Silverwolf
Accepted: : 210
#590: ucup-team228
Accepted: : 210
#590: ucup-team5248
Accepted: : 210
#590: YMH_fourteen
Accepted: : 210
$$4+9+19+10+15+9+14+20=\mathbf{100}$$