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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#75282#4996. Icy ItineraryxxzxWA 8ms20584kbC++14797b2023-02-04 19:12:172023-02-04 19:12:23

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-02-04 19:12:23]
  • 评测
  • 测评结果:WA
  • 用时:8ms
  • 内存:20584kb
  • [2023-02-04 19:12:17]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
const int N=3e5+10;
int n,m,pre[N],nxt[N],p=2,ans[N];
map<int,int> mp[N];
int main() {
	scanf("%d%d",&n,&m);
	for(int i=1,u,v;i<=m;i++) {
		scanf("%d%d",&u,&v);
		mp[u][v]=mp[v][u]=1;
	}
	if(mp[1][2]) nxt[1]=2, pre[2]=1;
	else nxt[2]=1, pre[1]=2;
	for(int i=3;i<=n;i++) {
		if(mp[i][p]) {
			pre[nxt[p]]=i, nxt[i]=nxt[p], pre[i]=p, nxt[p]=i;
			if(mp[i][nxt[i]]) p=nxt[i];
			else p=i;
		}	
		else {
			nxt[pre[p]]=i, pre[i]=pre[p], nxt[i]=p, pre[p]=i;
			if(mp[i][pre[i]]) p=i;
			else p=(pre[i]?pre[i]:i);
		}
	}
	int st=1;
	while(pre[st]) st=pre[st];
	for(int i=1;i<=n;i++) ans[i]=st, st=nxt[st];
	if(ans[1]==1) for(int i=1;i<=n;i++) printf("%d ",ans[i]);
	else for(int i=n;i>=1;i--) printf("%d ",ans[i]);
	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 8ms
memory: 19848kb

input:

4 4
1 2
1 3
1 4
3 4

output:

1 3 4 2 

result:

ok qwq

Test #2:

score: 0
Accepted
time: 3ms
memory: 20232kb

input:

5 0

output:

1 2 3 4 5 

result:

ok qwq

Test #3:

score: 0
Accepted
time: 4ms
memory: 20012kb

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 3 4 5 6 2 8 9 10 7 

result:

ok qwq

Test #4:

score: 0
Accepted
time: 7ms
memory: 20104kb

input:

2 1
1 2

output:

1 2 

result:

ok qwq

Test #5:

score: 0
Accepted
time: 3ms
memory: 19752kb

input:

2 0

output:

1 2 

result:

ok qwq

Test #6:

score: 0
Accepted
time: 0ms
memory: 19096kb

input:

3 1
1 3

output:

1 2 3 

result:

ok qwq

Test #7:

score: 0
Accepted
time: 1ms
memory: 20584kb

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 6 7 8 9 5 10 

result:

ok qwq

Test #8:

score: 0
Accepted
time: 0ms
memory: 19804kb

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: -100
Wrong Answer
time: 1ms
memory: 19844kb

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:

2 3 1 4 7 6 8 5 10 13 12 14 11 15 9 

result:

wrong answer The first number wasn't 1