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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
#88912#5828. 游戏Larunatrecy10 231ms69468kbC++143.5kb2023-03-17 21:55:292023-03-17 21:55:33

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.
  • [2023-03-17 21:55:33]
  • 评测
  • 测评结果:10
  • 用时:231ms
  • 内存:69468kb
  • [2023-03-17 21:55:29]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
const int N = 2e5+7;
struct edge
{
	int y,next;
}e[2*N];
int link[N],t=0;
void add(int x,int y)
{
	e[++t].y=y;
	e[t].next=link[x];
	link[x]=t;
}
namespace tree
{
	int dep[N],st[2*N][20],tot=0;
	int lg[2*N],dfn[N];
	void dfs(int x,int pre)
	{
		st[++tot][0]=x;
		dfn[x]=tot;
		for(int i=link[x];i;i=e[i].next)
		{
			int y=e[i].y;
			if(y==pre)continue;
			dep[y]=dep[x]+1;
			dfs(y,x);
			st[++tot][0]=x; 
		}
	}
	inline int Min(int x,int y)
	{
		return dep[x]<dep[y]?x:y;
	}
	void Build()
	{
		dfs(1,0);
		for(int i=2;i<=tot;i++)lg[i]=lg[i>>1]+1;
		for(int k=1;k<=lg[tot];k++)
		for(int i=1;i+(1<<k)-1<=tot;i++)
		st[i][k]=Min(st[i][k-1],st[i+(1<<(k-1))][k-1]);
	}
	inline int LCA(int x,int y)
	{
		x=dfn[x];y=dfn[y];
		if(x>y)swap(x,y);
		int k=lg[y-x+1];
		return Min(st[x][k],st[y-(1<<k)+1][k]);
	}
	inline int dist(int x,int y)
	{
		return dep[x]+dep[y]-2*dep[LCA(x,y)];
	}
}
int st,ed;
int n,m;
int A[N],B[N],fa[N];
void dfs(int x,int pre,int *D)
{
	for(int i=link[x];i;i=e[i].next)
	{
		int y=e[i].y;
		if(y==pre)continue;
		fa[y]=x;
		D[y]=D[x]+1;
		dfs(y,x,D);
	}
}
bool ins[N];
int seq[N];
int h[N];
void dfs2(int x,int pre)
{
	h[x]=0;
	for(int i=link[x];i;i=e[i].next)
	{
		int y=e[i].y;
		if(ins[y]||y==pre)continue;
		dfs2(y,x);
		h[x]=max(h[x],h[y]+1);
	}
}
int qoj[N],dfn[N];
int cnt=0;
void dfs3(int x,int pre)
{
	qoj[++cnt]=x;
	dfn[x]=cnt;
	for(int i=link[x];i;i=e[i].next)
	{
		int y=e[i].y;
		if(ins[y]||y==pre)continue;
		if(h[x]==h[y]+1)
		{
			dfs3(y,x);
			return;
		}
	}
}
int mx[N][20];
int lg[N];
inline int Max(int x,int y){return h[x]>h[y]?x:y;}
int x,y,z;
int query(int l,int r)
{
	int k=lg[r-l+1];
	return Max(mx[l][k],mx[r-(1<<k)+1][k]);
}
int dft[N];
bool check(int a,int b,int c)
{
	if(b==0) 
	{
		x=seq[1];
		y=seq[a+1];
		z=seq[a+c+1];
		return 1;
	}
	int l=a+1,r=m-c;
	if(l>r)return 0;
	int o=query(l,r);
	if(h[o]<b)return 0;
	x=seq[dft[o]-a];
	y=qoj[dfn[o]+b];
	z=seq[dft[o]+c];
	return 1;
}
bool check(int x,int y,int z,int u,int v,int w)
{
	if(tree::dist(x,y)!=u)return 0;
	if(tree::dist(y,z)!=v)return 0;
	if(tree::dist(z,x)!=w)return 0;
	return 1;
}
int main()
{
	cin>>n;
	for(int i=1;i<n;i++)
	{
		int u,v;
		scanf("%d %d",&u,&v);
		add(u,v);
		add(v,u);
	}
	tree::Build();
	dfs(1,0,A);
	for(int i=1;i<=n;i++)
	if(A[i]>A[st])st=i;
	fa[st]=0;
	dfs(st,0,B);
	for(int i=1;i<=n;i++)
	if(B[i]>B[ed])ed=i;
	int o=ed;
	int m=0;
	while(o)
	{
		ins[o]=1;
		seq[++m]=o;
		dft[o]=m;
		o=fa[o];
	}
	for(int i=1;i<=m;i++)
	{
		dfs2(seq[i],0);
		dfs3(seq[i],0);
		mx[i][0]=seq[i];
	}
	for(int i=2;i<=m;i++)lg[i]=lg[i>>1]+1;
	for(int k=1;k<=lg[m];k++)
	for(int i=1;i+(1<<k)-1<=m;i++)
	mx[i][k]=Max(mx[i][k-1],mx[i+(1<<(k-1))][k-1]); 
	cin>>m;
	while(m--)
	{
		int a,b,c;
		scanf("%d %d %d",&a,&b,&c);
		int u=a,v=b,w=c;
		bool flag=0;
		int d=(a+b+c)/2;
		a=d-a;b=d-b;c=d-c;
		if(!flag)flag|=check(a,b,c);
		if(!flag)flag|=check(a,c,b);
		if(!flag)flag|=check(b,a,c);
		if(!flag)flag|=check(b,c,a);
		if(!flag)flag|=check(c,a,b);
		if(!flag)flag|=check(c,b,a);
		if(check(x,y,z,u,v,w))printf("%d %d %d\n",x,y,z);
		else if(check(x,z,y,u,v,w))printf("%d %d %d\n",x,z,y);
		else if(check(y,x,z,u,v,w))printf("%d %d %d\n",y,x,z);
		else if(check(y,z,x,u,v,w))printf("%d %d %d\n",y,z,x);
		else if(check(z,x,y,u,v,w))printf("%d %d %d\n",z,x,y);
		else if(check(z,y,x,u,v,w))printf("%d %d %d\n",z,y,x);
		else printf("-1\n");
	}
	return 0;
}

详细

Test #1:

score: 0
Wrong Answer
time: 2ms
memory: 3692kb

input:

500
279 196
182 105
400 14
278 217
198 411
379 318
120 421
314 95
437 325
23 433
71 485
192 154
90 224
180 71
328 93
183 101
404 349
223 285
492 100
366 480
29 328
200 448
365 156
226 231
129 167
246 273
171 452
284 6
131 471
229 90
480 48
448 157
240 221
7 36
401 200
255 438
436 110
281 489
388 258...

output:

-1
-1
-1
-1
-1
184 461 57
-1
-1
-1
-1
-1
-1
171 401 57
-1
-1
-1
-1
-1
-1
-1
57 215 401
-1
-1
-1
-1
30 168 57
-1
-1
-1
-1
-1
-1
-1
-1
-1
343 424 57
-1
-1
-1
113 93 57
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
57 310 430
-1
57 132 184
57 28 493
-1
184 390 57
-1
57 227 478
-1
-1
-1
-1
-1
-1
-1
184 202 57
-1
-1
...

result:

wrong answer Integer -1 violates the range [1, 500]

Test #2:

score: 0
Wrong Answer
time: 2ms
memory: 4052kb

input:

2000
643 1871
689 23
1822 1443
1031 1027
1655 845
189 771
1561 498
19 1778
576 1080
904 717
1690 291
1387 1077
398 811
1310 1231
645 1291
480 927
330 170
1464 1057
1033 894
1308 288
1292 1529
1212 122
1108 401
89 1118
1058 1088
1764 1314
981 1255
1893 864
180 1887
1903 843
734 1412
883 1013
1739 124...

output:

1443 1227 324
-1
230 886 324
324 565 1822
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
1746 626 324
-1
-1
1746 831 324
-1
-1
-1
-1
-1
-1
-1
-1
1277 1202 324
-1
-1
-1
1953 886 324
-1
-1
-1
-1
324 626 1498
955 831 324
-1
1663 409 324
-1
-1
-1
-1
-1
-1
-1
-1
-1
324 1478 418
881 639 32...

result:

wrong answer Wrong answer on test 1

Test #3:

score: 0
Wrong Answer
time: 128ms
memory: 47400kb

input:

200000
56968 132021
105656 107536
123627 58349
119191 138198
133708 142638
114350 24980
137784 40346
124158 130204
80684 183207
78156 94449
21893 157560
54464 73571
145830 57756
160288 32120
178632 142663
26565 185985
70576 24906
32217 115826
185756 137673
54280 179613
77826 144447
66005 29955
11745...

output:

-1

result:

wrong answer Integer -1 violates the range [1, 200000]

Test #4:

score: 0
Wrong Answer
time: 165ms
memory: 47404kb

input:

200000
41999 100683
85781 129266
122431 179332
162416 44814
24405 42267
154161 12483
178049 159964
67625 152391
133072 25866
178005 14695
94384 170290
54701 40323
66280 128515
159022 55057
14985 12920
182805 40659
173117 67973
99771 26102
198919 94543
23608 187601
61125 5759
89437 47647
18142 192402...

output:

-1

result:

wrong answer Integer -1 violates the range [1, 200000]

Test #5:

score: 0
Wrong Answer
time: 139ms
memory: 47684kb

input:

200000
195072 75458
31991 127114
60943 49502
186375 1130
45394 147217
168455 84307
132752 188952
101108 130004
107490 22003
16275 187645
111002 42669
138880 137115
112688 172751
81697 99037
166996 18495
2234 56119
170807 101349
105736 23180
148159 40863
136678 11849
190707 91245
61779 120740
157115 ...

output:

-1
-1
-1
-1
-1
-1
-1
-1
-1
-1

result:

wrong answer Integer -1 violates the range [1, 200000]

Test #6:

score: 0
Wrong Answer
time: 135ms
memory: 47420kb

input:

200000
48556 78408
155026 9376
8983 61211
150393 85068
90892 109283
75746 89742
6760 187245
168658 130735
68602 127646
60802 149828
22898 59471
172845 100274
42303 190696
7612 134905
94702 59800
129633 192496
19903 64869
51318 63358
34692 66030
98535 176606
153647 177529
157903 147292
106273 107278
...

output:

-1
-1
-1
-1
-1
-1
122619 10980 119603
-1
-1
-1

result:

wrong answer Integer -1 violates the range [1, 200000]

Test #7:

score: 0
Wrong Answer
time: 231ms
memory: 69468kb

input:

200000
1 2
2 3
3 4
4 5
5 6
6 7
7 8
8 9
9 10
10 11
11 12
12 13
13 14
14 15
15 16
16 17
17 18
18 19
19 20
20 21
21 22
22 23
23 24
24 25
25 26
26 27
27 28
28 29
29 30
30 31
31 32
32 33
33 34
34 35
35 36
36 37
37 38
38 39
39 40
40 41
41 42
42 43
43 44
44 45
45 46
46 47
47 48
48 49
49 50
50 51
51 52
52 5...

output:

1 145645 62949
38957 68760 1
1 115484 20705
36782 16671 1
1 41631 5656
28131 114616 1
114785 58614 1
94241 171869 1
1 174290 131964
154225 175188 1
139642 142541 1
21712 82073 1
1 20583 16556
83956 177239 1
1 99183 8150
12843 94979 1
117147 136758 1
1 93202 55604
26120 9655 1
1 70963 31750
95600 281...

result:

wrong answer Wrong answer on test 1

Test #8:

score: 10
Accepted
time: 231ms
memory: 47572kb

input:

200000
5732 55198
128966 25317
114737 116391
150003 18274
43867 70745
76222 4169
55976 114951
198396 72896
38647 19711
12756 172119
73197 117994
117512 14177
130965 126990
119440 183341
142023 60829
111893 57350
122754 123305
36525 79077
36447 91967
135405 170456
165839 147481
66074 175822
22238 264...

output:

183543 183543 178310
98115 98115 178310
36778 36778 178310
30537 30537 178310
169883 169883 178310
65826 65826 178310
31265 31265 178310
161066 161066 178310
129717 129717 178310
85 85 178310
98442 98442 178310
118809 118809 178310
183881 183881 178310
87348 87348 178310
186490 186490 178310
113946 ...

result:

ok Accepted!

Test #9:

score: 0
Wrong Answer
time: 207ms
memory: 47628kb

input:

200000
185063 17064
180987 114492
88071 71803
158363 135918
60910 54848
97338 6734
192937 9410
49617 199068
82499 63554
188791 188152
178767 40866
11304 27212
144234 138097
42236 3946
103355 12683
50992 20598
145723 48620
11709 115688
123172 121379
70541 130844
147827 39431
139372 61280
42705 54015
...

output:

-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
79296 21266 180405
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
74059 24587 79296
-1
-1
-1
-1
-1...

result:

wrong answer Integer -1 violates the range [1, 200000]

Test #10:

score: 0
Wrong Answer
time: 212ms
memory: 47436kb

input:

200000
197244 185999
18639 124754
154223 12099
53676 167616
22710 22294
150412 66132
19320 75478
170410 122661
130961 175554
171586 85572
188386 81238
120249 117687
43214 126266
8744 165654
164725 189519
124144 170329
86605 100197
130545 17030
113301 96665
67733 187286
37846 146399
75352 117550
3235...

output:

-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
62668 29600 108697
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
108697 47105 181759
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
...

result:

wrong answer Integer -1 violates the range [1, 200000]