QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#327857 | #1844. Cactus | yqh2025 | AC ✓ | 464ms | 66936kb | C++14 | 1.7kb | 2024-02-15 15:04:29 | 2024-02-15 15:04:29 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
const int N=3e5+10;
int n,m;
vector<int>E[(N<<1)-10],G[N],ans;
int deg[N],dfn[N],low[N],tot,top,st[N],dl[N],cnt;
void an(int x){ans.push_back(x);}
void del(int x){
an(x);
dl[x]=1;deg[x]=0;
for(int v:E[x])if(!dl[v])deg[v]^=1;
for(int v:E[x])if(deg[v])del(v);
}
void dfs(int u){
dfn[u]=low[u]=++tot;st[++top]=u;
for(int v:G[u]){
if(!dfn[v]){
dfs(v);
if(low[v]>=dfn[u]){
cnt++;
while(st[top]!=v){
E[cnt].push_back(st[top]);
E[st[top]].push_back(cnt);
top--;
}
top--;
E[cnt].push_back(v);
E[v].push_back(cnt);
E[cnt].push_back(u);
E[u].push_back(cnt);
}
else low[u]=min(low[u],low[v]);
}
else low[u]=min(low[u],dfn[v]);
}
}
int vis[N],a[N];
void sol(int u,int fa){
vis[u]=1;
for(int v:E[u])if(v!=fa)sol(v,u);
if(u<=n){
if(!fa)an(u);
return;
}
int p=0,m=E[u].size();
for(int i=0;i<m;i++)if(E[u][i]==fa)p=i;
for(int i=0;i<m;i++)a[i]=E[u][(p+i)%m];
for(int i=1;i<m;i++)an(a[i]+((i&1)^1)*n);
an(a[m-1]+((m-1)&1)*n);an(a[1]+n);
}
int main(){
scanf("%d%d",&n,&m);
for(int i=1;i<=m;i++){
int x,y;scanf("%d%d",&x,&y);
E[x].push_back(y);E[y].push_back(x);
deg[x]^=1;deg[y]^=1;
}
for(int i=1;i<=n;i++)if(deg[i]&1)del(i);
an(0);
for(int i=1;i<=n;i++){
if(!dl[i]){
for(int j:E[i]){
if(!dl[j])G[i].push_back(j),G[j].push_back(i);
}
}
}
for(int i=1;i<=n;i++)E[i].clear(),E[i].shrink_to_fit();
cnt=n;
for(int i=1;i<=n;i++)if(!dfn[i])dfs(i);
for(int i=1;i<=n;i++)if(!vis[i])sol(i,0);
printf("0 %d\n",ans.size());
for(int i:ans){
if(i==0)printf("2\n");
else printf("1 %d\n",i);
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 8ms
memory: 28020kb
input:
3 3 1 2 1 3 2 3
output:
0 6 2 1 3 1 5 1 2 1 6 1 1
result:
ok You are right!
Test #2:
score: 0
Accepted
time: 0ms
memory: 30472kb
input:
7 7 1 2 1 3 2 3 2 4 2 5 3 6 3 7
output:
0 13 1 4 1 2 1 1 1 6 1 3 2 1 1 1 2 1 3 1 4 1 5 1 6 1 7
result:
ok You are right!
Test #3:
score: 0
Accepted
time: 186ms
memory: 44052kb
input:
300000 368742 1 143504 1 234282 2 91276 2 296320 3 274816 4 212293 4 258214 5 253489 5 295826 6 96521 6 252745 6 267103 6 269879 7 5293 7 295586 8 44304 8 57067 8 233291 9 190526 10 18682 11 7440 12 24695 12 172561 12 243692 12 280316 13 80152 13 268749 14 146394 14 207280 15 151280 15 226848 16 458...
output:
0 521873 1 3 1 274816 1 273658 1 217572 1 248509 1 231418 1 73094 1 117739 1 11855 1 48428 1 55953 1 121689 1 234392 1 181317 1 238712 1 77369 1 105062 1 6838 1 130659 1 8 1 44304 1 9 1 10 1 18682 1 63155 1 148043 1 194189 1 26612 1 1155 1 31020 1 108936 1 71065 1 77412 1 124995 1 126920 1 53663 1 4...
result:
ok You are right!
Test #4:
score: 0
Accepted
time: 285ms
memory: 50140kb
input:
221155 322762 1 16446 1 214165 2 22590 2 67599 2 77971 2 173665 3 93601 3 218260 4 78445 4 126476 5 85674 5 129671 6 105765 6 161364 7 16742 7 19554 7 28037 7 51308 7 57193 7 151371 7 173612 7 218897 8 50830 8 178401 9 36068 9 198155 10 31227 10 57914 11 104822 11 196836 12 57848 12 129309 13 17006 ...
output:
0 424372 2 1 85270 1 239806 1 18651 1 306425 1 179493 1 236953 1 15798 1 400648 1 163470 1 355214 1 134059 1 384625 1 210938 1 269691 1 48536 1 432093 1 75265 1 270504 1 823 1 221978 1 296420 1 135886 1 309443 1 88288 1 357041 1 138878 1 282173 1 61018 1 360033 1 132540 1 311111 1 89956 1 353695 1 8...
result:
ok You are right!
Test #5:
score: 0
Accepted
time: 317ms
memory: 60676kb
input:
299999 449997 1 135132 1 274953 2 18542 2 217508 3 47624 3 205183 4 121104 4 270541 5 117846 5 249889 6 272286 6 286376 7 63903 7 89777 8 153806 8 271509 9 49792 9 220343 10 4543 10 293635 11 99727 11 261001 12 29177 12 108823 13 119446 13 183797 14 210754 14 247874 15 53747 15 122774 15 179117 15 2...
output:
0 599998 2 1 110522 1 308521 1 8522 1 410521 1 45846 1 327016 1 27017 1 345845 1 239835 1 476378 1 176379 1 539834 1 296881 1 392149 1 92150 1 596880 1 287760 1 509538 1 209539 1 587759 1 228488 1 381764 1 81765 1 528487 1 260110 1 333647 1 33648 1 560109 1 283208 1 322594 1 22595 1 583207 1 244476 ...
result:
ok You are right!
Test #6:
score: 0
Accepted
time: 285ms
memory: 48048kb
input:
300000 399999 1 215446 1 231704 2 115181 2 170051 3 1993 3 176144 4 18113 5 34133 5 53137 6 163395 6 256615 7 39049 7 128932 8 193977 8 205442 9 2810 9 260471 10 169593 10 278417 11 56849 11 139915 12 78729 12 164991 13 55416 13 62164 14 195504 14 254962 15 41739 15 143315 16 61905 16 244260 16 2772...
output:
0 511052 1 4 1 16 1 18 1 22 1 202949 1 285958 1 29 1 30 1 26134 1 271021 1 32 1 123549 1 181630 1 103490 1 257757 1 26829 1 52124 1 64135 1 65458 1 71442 1 80024 1 233192 1 109574 1 81157 1 35 1 139478 1 250704 1 64740 1 52176 1 166094 1 224937 1 263467 1 100032 1 77446 1 226783 1 128106 1 200630 1 ...
result:
ok You are right!
Test #7:
score: 0
Accepted
time: 464ms
memory: 66936kb
input:
299999 449997 1 207233 1 249849 2 26483 2 120133 3 48410 3 154146 3 264694 3 276131 4 33119 4 235166 5 104107 5 256329 6 121201 6 153902 7 217994 7 249799 8 98561 8 149095 8 161763 8 244331 9 113135 9 263126 10 78235 10 93112 11 58805 11 104743 11 135998 11 140583 11 199748 11 227329 12 34054 12 124...
output:
0 599998 2 1 296238 1 315657 1 15658 1 596237 1 66690 1 321436 1 21437 1 366689 1 117216 1 359976 1 59977 1 417215 1 246990 1 442541 1 142542 1 546989 1 147559 1 401580 1 101581 1 447558 1 61236 1 311235 1 11236 1 361235 1 59754 1 347645 1 47646 1 359753 1 286714 1 304298 1 4299 1 586713 1 286537 1 ...
result:
ok You are right!
Test #8:
score: 0
Accepted
time: 353ms
memory: 57544kb
input:
280291 392867 1 18749 1 136817 2 63519 2 159662 2 172896 2 251761 3 1878 3 142748 4 203284 4 228584 5 15844 5 50208 6 136817 6 245137 7 64955 7 165499 8 136817 8 220201 9 136817 9 191205 10 136817 10 192877 11 139542 11 162473 12 57326 12 190877 13 33859 13 153427 14 110791 14 136817 15 16389 15 864...
output:
0 505446 2 1 245137 1 280297 1 6 1 525428 1 220201 1 280299 1 8 1 500492 1 191205 1 280300 1 9 1 471496 1 192877 1 280301 1 10 1 473168 1 110791 1 280305 1 14 1 391082 1 17196 1 280317 1 26 1 297487 1 205340 1 280321 1 30 1 485631 1 240440 1 280322 1 31 1 520731 1 38981 1 280327 1 36 1 319272 1 2377...
result:
ok You are right!
Test #9:
score: 0
Accepted
time: 367ms
memory: 63768kb
input:
292995 410094 1 71999 1 169963 2 98256 2 132856 3 132856 3 165225 4 82003 4 132856 5 132364 5 160935 6 35335 6 147436 7 132856 7 255985 8 132856 8 200164 9 4463 9 156552 10 2320 10 99646 11 132856 11 185279 12 110686 12 285870 13 73136 13 275400 14 121746 14 132856 15 153856 15 278178 16 83552 16 21...
output:
0 527196 2 1 177036 1 469916 1 176921 1 470031 1 189920 1 348593 1 55598 1 482915 1 155108 1 410865 1 117870 1 448103 1 204681 1 382038 1 89043 1 497676 1 188034 1 449005 1 156010 1 481029 1 248854 1 303684 1 10689 1 541849 1 78740 1 331693 1 38698 1 371735 1 183490 1 444359 1 151364 1 476485 1 2627...
result:
ok You are right!
Test #10:
score: 0
Accepted
time: 181ms
memory: 43496kb
input:
300000 403707 1 129294 1 278573 2 11106 2 129294 3 184237 3 221196 4 55817 4 100929 4 136405 4 238314 5 31450 5 186997 6 4795 7 129294 7 163574 8 61455 8 129294 9 21984 9 129294 10 231237 11 129294 11 228549 12 129294 12 224390 13 19505 13 26574 14 55849 14 98378 15 23106 16 4025 16 100577 17 67090 ...
output:
0 495571 1 6 1 10 1 231237 1 158616 1 69702 1 15 1 23106 1 19 1 20 1 68436 1 110694 1 14262 1 110432 1 247212 1 49549 1 244837 1 11639 1 141945 1 171293 1 25 1 26 1 37 1 90299 1 43 1 44 1 220797 1 7582 1 153915 1 210713 1 53091 1 36603 1 89991 1 60626 1 71253 1 140486 1 24893 1 7891 1 138920 1 22312...
result:
ok You are right!
Test #11:
score: 0
Accepted
time: 3ms
memory: 25272kb
input:
1 0
output:
0 2 2 1 1
result:
ok You are right!
Test #12:
score: 0
Accepted
time: 135ms
memory: 42292kb
input:
255596 313062 1 10655 1 15889 1 35851 1 220010 1 243820 2 236476 3 75462 3 240876 3 241881 4 164691 5 112681 6 31313 6 40322 6 89447 6 199617 7 78108 7 249785 8 180866 8 225929 9 26444 10 209074 11 108986 12 147579 12 165165 13 53313 13 182814 13 230088 14 124147 15 73182 15 98755 15 212191 16 98391...
output:
0 415963 1 1 1 10655 1 15889 1 220010 1 243820 1 216583 1 68743 1 101829 1 86887 1 2 1 3 1 75462 1 240876 1 241881 1 1722 1 4 1 5 1 9 1 10 1 209074 1 177824 1 11 1 108986 1 13 1 182814 1 14 1 124147 1 5520 1 9028 1 62318 1 72214 1 187645 1 116944 1 15 1 18 1 147217 1 195359 1 49875 1 37460 1 74697 1...
result:
ok You are right!
Test #13:
score: 0
Accepted
time: 270ms
memory: 55652kb
input:
244001 330353 1 33864 1 90721 1 120604 1 122898 1 195228 1 211057 2 9529 2 118870 3 35564 3 229469 4 81097 4 236945 5 47476 5 223470 6 46769 6 48597 7 49304 7 146411 7 154996 7 220507 8 14839 8 162760 9 85423 9 114698 10 4239 10 32108 10 39949 10 85700 11 160326 11 205183 12 25068 12 156392 13 13985...
output:
0 416708 2 1 134026 1 272387 1 28386 1 378027 1 172020 1 319560 1 75559 1 416021 1 70826 1 289513 1 45512 1 314827 1 98456 1 327902 1 83901 1 342457 1 70923 1 459202 1 12203 1 256204 1 314924 1 95364 1 282614 1 38613 1 339365 1 192223 1 409741 1 165740 1 436224 1 119886 1 292313 1 48312 1 363887 1 2...
result:
ok You are right!