QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#80326 | #4996. Icy Itinerary | fansizhe | RE | 496ms | 49240kb | C++14 | 1.7kb | 2023-02-23 14:25:41 | 2023-02-23 14:25:44 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
int n,m;
set<int> edge[300005];
int id[300005];
int pre[300005],nxt[300005],pos;
int find(int x,int y){return edge[x].find(y)!=edge[x].end();}
unsigned seed=114514;
unsigned getrand(){
seed^=seed<<11;
seed^=seed>>9;
seed^=seed<<17;
return seed;
}
int main(){
scanf("%d%d",&n,&m);
for(int i=1;i<=m;i++){
int x,y;scanf("%d%d",&x,&y);
edge[x].insert(y);
edge[y].insert(x);
}
pos=1;
for(int i=2;i<=n;i++)
if(!nxt[pos]){nxt[pos]=i,pre[i]=pos;if(i==2||find(i,pos)==find(pre[pos],pos))pos=i;}
else if(find(i,pos)==find(pos,pre[pos])){
pre[nxt[pos]]=i,nxt[i]=nxt[pos],nxt[pos]=i,pre[i]=pos;
if(find(pos,i)==find(i,nxt[i]))pos=nxt[i];
else pos=i;
}else{
nxt[pre[pos]]=i,pre[i]=pre[pos],pre[pos]=i,nxt[i]=pos;
if(find(pos,i)==find(i,pre[i]))pos=pre[i];
else pos=i;
}
// assert(!pre[1]);
while(pre[1]){
memset(pre,0,sizeof(pre));
memset(nxt,0,sizeof(nxt));
pos=1;
for(int i=1;i<n;i++)id[i]=i+1;
for(int i=2;i<n;i++)swap(id[i],id[getrand()%i+1]);
for(int i=1;i<n;i++){
int x=id[i];
if(!nxt[pos]){nxt[pos]=x,pre[x]=pos;if(!pre[pos]||find(x,pos)==find(pre[pos],pos))pos=x;}
else if(find(x,pos)==find(pos,pre[pos])){
assert(find(x,pos)!=find(pos,nxt[pos]));
pre[nxt[pos]]=x,nxt[x]=nxt[pos],nxt[pos]=x,pre[x]=pos;
if(find(pos,x)==find(x,nxt[x]))pos=nxt[x];
else pos=x;
}else{
assert(find(x,pos)==find(pos,nxt[pos]));
nxt[pre[pos]]=x,pre[x]=pre[pos],pre[pos]=x,nxt[x]=pos;
if(find(pos,x)==find(x,pre[x]))pos=pre[x];
else pos=x;
}
}
}
int cnt=0;for(int i=1;i;i=nxt[i])cnt++;assert(cnt==n);
for(int i=1;i;i=nxt[i])printf("%d ",i);
puts("");
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 5ms
memory: 17848kb
input:
4 4 1 2 1 3 1 4 3 4
output:
1 4 2 3
result:
ok qwq
Test #2:
score: 0
Accepted
time: 7ms
memory: 19212kb
input:
5 0
output:
1 2 3 4 5
result:
ok qwq
Test #3:
score: 0
Accepted
time: 1ms
memory: 19700kb
input:
10 10 7 8 7 5 5 2 6 1 10 7 4 6 5 8 3 2 10 5 1 10
output:
1 2 4 3 5 6 7 9 8 10
result:
ok qwq
Test #4:
score: 0
Accepted
time: 5ms
memory: 18024kb
input:
2 1 1 2
output:
1 2
result:
ok qwq
Test #5:
score: 0
Accepted
time: 4ms
memory: 17988kb
input:
2 0
output:
1 2
result:
ok qwq
Test #6:
score: 0
Accepted
time: 1ms
memory: 17920kb
input:
3 1 1 3
output:
1 2 3
result:
ok qwq
Test #7:
score: 0
Accepted
time: 11ms
memory: 19668kb
input:
10 40 10 9 4 5 2 7 3 4 4 7 4 9 7 3 5 10 5 9 8 1 1 10 6 7 6 9 9 8 10 7 7 8 8 3 10 3 2 1 1 5 6 1 5 7 2 5 3 9 2 8 1 9 4 1 1 7 4 10 2 10 3 1 4 6 9 7 3 6 2 3 8 4 6 8 3 5 4 2 2 6
output:
1 2 3 4 5 7 6 8 9 10
result:
ok qwq
Test #8:
score: 0
Accepted
time: 4ms
memory: 19596kb
input:
10 45 7 2 6 3 7 10 5 1 1 9 6 8 10 1 2 10 10 8 10 5 6 2 4 3 6 7 10 3 3 2 1 8 10 9 2 5 9 2 4 1 8 3 8 2 5 7 4 8 9 4 1 7 7 3 6 10 4 2 6 4 10 4 3 1 8 5 4 7 1 6 9 5 3 9 6 5 5 4 9 7 2 1 8 9 3 5 6 9 7 8
output:
1 2 3 4 5 6 7 8 9 10
result:
ok qwq
Test #9:
score: 0
Accepted
time: 4ms
memory: 18936kb
input:
15 40 12 11 11 6 5 11 15 14 10 14 15 5 1 11 10 12 4 3 6 4 4 9 2 11 6 12 13 7 7 9 10 9 1 2 9 11 2 6 7 14 2 9 3 13 9 1 2 7 8 11 1 10 13 1 4 15 3 7 2 15 6 5 10 15 4 14 15 6 2 4 3 11 1 14 2 8 1 8 10 7
output:
1 2 9 15 11 14 12 13 10 8 4 7 6 3 5
result:
ok qwq
Test #10:
score: 0
Accepted
time: 7ms
memory: 18464kb
input:
15 1 13 6
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
result:
ok qwq
Test #11:
score: 0
Accepted
time: 3ms
memory: 18344kb
input:
150 150 110 99 80 122 55 67 24 47 73 68 150 13 94 140 146 59 136 28 94 134 131 2 26 105 65 79 57 37 116 102 84 16 110 78 72 5 34 8 8 43 83 57 49 146 43 112 54 139 95 13 11 95 75 29 29 30 52 14 118 56 4 51 18 146 31 113 56 69 44 14 63 123 44 66 101 122 52 10 16 118 71 93 22 113 28 88 5 108 16 48 84 1...
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 16 15 17 18 19 20 21 22 23 24 25 26 27 28 29 31 30 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 71 70 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 ...
result:
ok qwq
Test #12:
score: 0
Accepted
time: 1ms
memory: 19668kb
input:
1500 1500 370 639 1046 375 1191 907 782 923 1369 196 998 194 640 331 309 631 1053 1076 887 1112 650 1437 2 1133 847 302 647 81 22 691 772 14 1112 62 266 1399 865 980 1302 1146 1007 575 1448 261 1489 1189 1134 1009 7 1175 1369 942 709 365 675 514 1021 1250 1415 2 976 746 564 388 431 326 43 147 385 81...
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 ...
result:
ok qwq
Test #13:
score: 0
Accepted
time: 16ms
memory: 20796kb
input:
15000 15000 11602 9990 5492 14226 2633 14599 7956 12544 1258 1198 13788 3283 171 3770 8226 10782 915 6735 7186 14219 12806 1549 8783 5596 3692 9668 370 4654 13811 4032 835 12990 14273 14020 8902 7798 7405 4524 7476 1864 7786 14984 4367 13552 2927 2463 1929 3198 97 5800 14012 5674 6283 827 13860 1139...
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 ...
result:
ok qwq
Test #14:
score: 0
Accepted
time: 31ms
memory: 20412kb
input:
300000 0
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 ...
result:
ok qwq
Test #15:
score: 0
Accepted
time: 39ms
memory: 20360kb
input:
300000 1 80856 110687
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 ...
result:
ok qwq
Test #16:
score: 0
Accepted
time: 24ms
memory: 20268kb
input:
300000 100 254473 70041 278954 218026 54339 23948 90766 35432 145294 42945 10824 168971 162204 196321 137959 274421 274330 8901 113606 229638 136217 161945 232685 214848 91296 146678 8764 206628 297190 163150 140047 161791 188167 261504 261443 160497 262029 233857 112139 37654 43010 192683 3697 1727...
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 ...
result:
ok qwq
Test #17:
score: 0
Accepted
time: 142ms
memory: 30164kb
input:
300000 100000 279619 105099 95580 46691 139476 105331 67098 144910 105689 84242 198438 147050 274697 179922 229381 179041 210820 243557 162433 137909 14644 17464 295783 151723 180167 63360 17314 119555 201506 121519 129982 11913 3312 283798 197026 175391 86210 36036 177182 150502 37900 95301 261630 ...
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 ...
result:
ok qwq
Test #18:
score: 0
Accepted
time: 367ms
memory: 49240kb
input:
300000 300000 297121 280398 49505 181149 186167 88552 250816 195719 113345 180891 103968 274040 148345 167433 283785 32444 281156 62491 76167 222701 181130 69399 291957 220950 21996 17907 98113 270806 247895 36687 122761 248769 235623 41248 274601 174896 296046 235115 57460 64170 286130 15089 91951 ...
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 ...
result:
ok qwq
Test #19:
score: 0
Accepted
time: 487ms
memory: 47324kb
input:
1000 300000 794 378 253 365 792 287 235 482 50 807 795 174 786 980 763 645 615 440 364 542 209 856 925 709 965 709 755 592 242 870 960 978 253 404 164 439 931 998 443 318 663 958 560 445 970 245 192 631 321 621 120 472 402 520 939 454 436 893 840 577 112 961 509 9 815 190 357 128 52 433 554 967 384 ...
output:
1 2 3 10 16 19 20 22 21 23 26 28 29 27 30 31 35 38 41 43 42 45 49 50 46 51 48 55 56 54 57 53 58 52 59 60 47 61 62 63 44 64 66 65 67 70 71 69 72 68 73 74 76 77 78 75 80 81 79 82 83 40 84 91 92 88 93 90 94 95 96 97 98 100 99 101 102 89 104 105 107 108 106 109 103 110 111 112 119 118 120 87 123 125 126...
result:
ok qwq
Test #20:
score: 0
Accepted
time: 456ms
memory: 46528kb
input:
1500 300000 1189 1031 85 1047 1096 1290 1497 193 885 27 603 979 1438 1441 507 1256 1432 803 332 750 536 157 333 1248 1009 943 857 422 849 796 1399 814 911 481 836 36 1360 1175 592 737 277 672 551 331 849 1049 725 343 1312 112 889 544 1154 691 1387 1326 91 481 432 689 1051 248 1069 1499 499 194 748 1...
output:
1 2 3 4 5 6 7 8 10 9 11 17 18 23 25 26 24 27 22 30 31 29 32 28 33 34 35 36 21 37 16 38 20 39 19 40 15 41 14 42 43 44 45 12 46 13 47 48 49 50 52 53 51 54 58 60 59 61 57 62 63 56 64 55 65 66 69 70 67 71 72 68 73 74 75 76 77 78 79 80 84 85 83 86 81 87 82 89 93 94 95 96 92 97 101 102 103 104 100 105 99 ...
result:
ok qwq
Test #21:
score: 0
Accepted
time: 496ms
memory: 46976kb
input:
10000 300000 1236 4556 6003 6937 2217 6717 1150 1520 835 87 6994 6123 4263 8371 6772 4802 7302 3130 6157 4469 9918 3820 1997 5129 9662 7860 5882 9655 4931 8546 4776 1017 3925 6960 8114 6760 7793 3511 2958 3481 7244 3603 8609 4155 1832 2597 1639 6861 6563 8641 7870 3706 3772 4396 7696 6907 8722 1019 ...
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 ...
result:
ok qwq
Test #22:
score: 0
Accepted
time: 1ms
memory: 18340kb
input:
10 40 1 5 2 5 3 5 4 5 6 5 7 5 8 5 9 5 10 5 1 2 3 2 4 2 6 2 7 2 8 2 9 2 10 2 1 4 3 4 6 4 7 4 8 4 9 4 10 4 1 10 3 10 6 10 7 10 8 10 9 10 1 3 6 3 7 3 8 3 9 3 1 8 6 8 7 8 9 8 1 9
output:
1 2 3 4 5 6 8 7 10 9
result:
ok qwq
Test #23:
score: 0
Accepted
time: 5ms
memory: 19628kb
input:
100 198 1 7 2 7 3 7 4 7 5 7 6 7 8 7 9 7 10 7 11 7 12 7 13 7 14 7 15 7 16 7 17 7 18 7 19 7 20 7 21 7 22 7 23 7 24 7 25 7 26 7 27 7 28 7 29 7 30 7 31 7 32 7 33 7 34 7 35 7 36 7 37 7 38 7 39 7 40 7 41 7 42 7 43 7 44 7 45 7 46 7 47 7 48 7 49 7 50 7 51 7 52 7 53 7 54 7 55 7 56 7 57 7 58 7 59 7 60 7 61 7 ...
output:
1 2 3 4 5 6 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 72 71 7
result:
ok qwq
Test #24:
score: 0
Accepted
time: 216ms
memory: 46412kb
input:
1000 300000 1 965 2 965 3 965 4 965 5 965 6 965 7 965 8 965 9 965 10 965 11 965 12 965 13 965 14 965 15 965 16 965 17 965 18 965 19 965 20 965 21 965 22 965 23 965 24 965 25 965 26 965 27 965 28 965 29 965 30 965 31 965 32 965 33 965 34 965 35 965 36 965 37 965 38 965 39 965 40 965 41 965 42 965 43 ...
output:
1 2 30 31 38 41 42 45 46 47 48 51 60 61 120 121 122 135 140 141 142 145 146 149 154 155 170 171 176 179 180 181 182 183 192 213 216 217 222 229 230 233 234 241 242 245 248 249 258 259 266 267 268 269 274 275 276 277 290 307 310 311 314 315 316 317 318 321 322 323 326 351 354 359 366 367 368 383 384 ...
result:
ok qwq
Test #25:
score: 0
Accepted
time: 123ms
memory: 45768kb
input:
3000 300000 1 395 2 395 3 395 4 395 5 395 6 395 7 395 8 395 9 395 10 395 11 395 12 395 13 395 14 395 15 395 16 395 17 395 18 395 19 395 20 395 21 395 22 395 23 395 24 395 25 395 26 395 27 395 28 395 29 395 30 395 31 395 32 395 33 395 34 395 35 395 36 395 37 395 38 395 39 395 40 395 41 395 42 395 43 ...
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 67 68 69 70 71 72 73 74 75 76 77 78 81 82 83 84 85 86 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 1...
result:
ok qwq
Test #26:
score: 0
Accepted
time: 156ms
memory: 46816kb
input:
10000 300000 1 9020 2 9020 3 9020 4 9020 5 9020 6 9020 7 9020 8 9020 9 9020 10 9020 11 9020 12 9020 13 9020 14 9020 15 9020 16 9020 17 9020 18 9020 19 9020 20 9020 21 9020 22 9020 23 9020 24 9020 25 9020 26 9020 27 9020 28 9020 29 9020 30 9020 31 9020 32 9020 33 9020 34 9020 35 9020 36 9020 37 9020 ...
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 ...
result:
ok qwq
Test #27:
score: 0
Accepted
time: 159ms
memory: 47840kb
input:
40000 300000 1 8681 2 8681 3 8681 4 8681 5 8681 6 8681 7 8681 8 8681 9 8681 10 8681 11 8681 12 8681 13 8681 14 8681 15 8681 16 8681 17 8681 18 8681 19 8681 20 8681 21 8681 22 8681 23 8681 24 8681 25 8681 26 8681 27 8681 28 8681 29 8681 30 8681 31 8681 32 8681 33 8681 34 8681 35 8681 36 8681 37 8681 ...
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 ...
result:
ok qwq
Test #28:
score: 0
Accepted
time: 169ms
memory: 48464kb
input:
100000 300000 1 97406 2 97406 3 97406 4 97406 5 97406 6 97406 7 97406 8 97406 9 97406 10 97406 11 97406 12 97406 13 97406 14 97406 15 97406 16 97406 17 97406 18 97406 19 97406 20 97406 21 97406 22 97406 23 97406 24 97406 25 97406 26 97406 27 97406 28 97406 29 97406 30 97406 31 97406 32 97406 33 9740...
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 ...
result:
ok qwq
Test #29:
score: 0
Accepted
time: 173ms
memory: 48332kb
input:
300000 300000 1 193103 2 193103 3 193103 4 193103 5 193103 6 193103 7 193103 8 193103 9 193103 10 193103 11 193103 12 193103 13 193103 14 193103 15 193103 16 193103 17 193103 18 193103 19 193103 20 193103 21 193103 22 193103 23 193103 24 193103 25 193103 26 193103 27 193103 28 193103 29 193103 30 19...
output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 ...
result:
ok qwq
Test #30:
score: -100
Dangerous Syscalls
input:
1000 249500 1 702 1 559 1 154 1 284 1 707 1 397 1 281 1 105 1 856 1 712 1 864 1 638 1 640 1 984 1 134 1 819 1 36 1 820 1 146 1 779 1 516 1 420 1 721 1 932 1 426 1 922 1 790 1 167 1 365 1 667 1 690 1 357 1 543 1 778 1 473 1 9 1 239 1 746 1 983 1 141 1 349 1 852 1 826 1 553 1 929 1 628 1 500 1 352 1 6...