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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#718748#9605. 新生舞会thomaswmy50 1400ms83652kbC++142.8kb2024-11-06 21:20:542024-11-06 21:20:55

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你现在查看的是最新测评结果

  • [2024-11-06 21:20:55]
  • 评测
  • 测评结果:50
  • 用时:1400ms
  • 内存:83652kb
  • [2024-11-06 21:20:54]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
const int N=2e6+10;
const int SZ=3.5e6+10;

struct edg{
	int to,nxt;
}edge[N];

int cnt,head[N];

void add(int u,int v) {
	edge[++cnt]={v,head[u]},head[u]=cnt;
}

int T;
int n;
int p[N];
int num;
int ans;

struct Node{
	int ch[2];
	int siz;
	int tag;
	#define ch(x) t[x].ch
	#define siz(x) t[x].siz
	#define tag(x) t[x].tag
}t[SZ];

int tot;
vector<int> stk;
int *rt;

int New() {
	int id;
	if(!stk.empty()) id=stk.back(),stk.pop_back();
	else id=++tot;
	assert(id<SZ);
	t[id]={{0,0},0,0};
	return id;
}

void pushup(int id) {
	siz(id)=siz(ch(id)[0])+siz(ch(id)[1]);
}

void pushdown(int id,int k) {
	if(tag(id)) {
		if(tag(id)>>k&1) swap(ch(id)[0],ch(id)[1]);
		if(ch(id)[0]) tag(ch(id)[0])^=tag(id);
		if(ch(id)[1]) tag(ch(id)[1])^=tag(id);
		tag(id)=0;
	}
}

void ins(int p,int val) {
	int pp=p;
	bool flag=0;
	for(int i=20;i>=0;i--) {
		pushdown(p,i);
		int v=val>>i&1;
		if(!ch(p)[v]) {
			flag=1;
			break;
		}
		p=ch(p)[v];
	}
	if(!flag) return ;
	p=pp;
	siz(p)++;
	for(int i=20;i>=0;i--) {
		int v=val>>i&1;
		if(!ch(p)[v]) ch(p)[v]=New();
		p=ch(p)[v];
		siz(p)++;
	}
}

int mg(int p,int q,int k) {
	if(!p || !q) return p|q;
	pushdown(p,k);
	pushdown(q,k);
	ch(p)[0]=mg(ch(p)[0],ch(q)[0],k-1);
	ch(p)[1]=mg(ch(p)[1],ch(q)[1],k-1);
	stk.push_back(q);
	if(k) pushup(p);
	return p;
}

int query(int p) {
	int res=0;
	for(int i=20;i>=0;i--) {
		if(!p) break;
		if(siz(p)==1<<i+1) {
			res+=1<<i+1;
			break;
		}
		pushdown(p,i);
		if(siz(ch(p)[0])==1<<i) res+=(1<<i),p=ch(p)[1];
		else p=ch(p)[0];
	}
	return res;
}

void dfs() {
	static int stk[N];
	int top=1;
	stk[1]=1;
	while(top>0) {
		int u=stk[top--];
		siz(++num)=u;
		for(int i=head[u];i;i=edge[i].nxt) {
			int v=edge[i].to;
			if(v==tag(u)) continue;
			stk[++top]=v;
		}
		if(tag(u)) stk[++top]=tag(u);
	}
}

int main() {
	scanf("%d",&T);
	while(T--) {
		scanf("%d",&n);
		for(int i=2;i<=n;i++) {
			scanf("%d",&p[i]);
		}
		for(int i=1;i<=n;i++) head[i]=1,tag(i)=0;
		for(int i=n;i>1;i--) {
			head[p[i]]+=head[i];
			if(head[p[i]]>head[tag(p[i])]) tag(p[i])=i;
		}
		cnt=0;
		for(int i=1;i<=n;i++) head[i]=0;
		for(int i=2;i<=n;i++) add(p[i],i);
		num=0;
		dfs();
		for(int i=1;i<=n;i++) edge[i].to=siz(i),edge[i].nxt=0;
		tot=0;
		rt=head;
		for(int i=1;i<=n;i++) rt[i]=0;
		stk.clear();
		for(int i=n;i>=1;i--) {
			int u=edge[i].to;
			int xr=0;
			if(!rt[u]) rt[u]=New();
			ins(rt[u],0);
			tag(rt[u])^=edge[u].nxt;
			edge[u].nxt=query(rt[u]);
			tag(rt[u])^=edge[u].nxt;
			if(p[u]) {
				if(!rt[p[u]]) rt[p[u]]=rt[u];
				else rt[p[u]]=mg(rt[p[u]],rt[u],20);
				edge[p[u]].nxt^=edge[u].nxt;
			}
		}
		ans^=edge[1].nxt;
	}
	printf("%d",ans);
	return 0;
}

Details

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Subtask #1:

score: 10
Accepted

Test #1:

score: 10
Accepted
time: 0ms
memory: 12128kb

input:

12
13
1 2 1 4 2 5 3 3 2 9 6 4
392
1 2 2 4 4 3 3 6 9 10 9 11 13 14 15 15 17 18 19 20 6 21 23 12 24 26 27 28 29 30 31 32 33 31 34 33 36 9 38 40 41 25 42 44 45 46 47 48 49 50 51 52 53 21 32 52 54 58 59 60 53 61 63 64 65 66 67 68 69 70 4 1 71 74 75 76 77 78 79 80 81 52 82 55 84 86 84 87 89 90 91 92 93 1...

output:

1875

result:

ok 1 number(s): "1875"

Test #2:

score: 10
Accepted
time: 5ms
memory: 12216kb

input:

1
5000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 5 21 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 79 85 87 88 89 90 91 92 93 94 95 96 97 98 99 100 10...

output:

4950

result:

ok 1 number(s): "4950"

Test #3:

score: 10
Accepted
time: 0ms
memory: 12268kb

input:

1
5000
1 1 2 1 2 2 3 4 9 10 9 12 13 10 15 12 14 14 18 20 19 22 19 20 21 24 26 27 25 30 30 32 33 33 33 32 34 35 38 40 39 38 40 43 43 44 43 46 48 50 50 48 50 53 53 52 56 56 57 56 57 60 61 61 61 62 66 65 69 67 71 70 71 73 75 73 73 75 78 80 78 80 82 80 82 84 86 85 89 86 87 92 92 92 95 94 95 95 95 100 10...

output:

3204

result:

ok 1 number(s): "3204"

Subtask #2:

score: 10
Accepted

Test #4:

score: 10
Accepted
time: 1223ms
memory: 34504kb

input:

15
1
5
1 1 3 3
10603
1 2 2 1 5 3 6 3 2 7 6 6 10 5 4 16 4 16 18 4 11 22 8 14 2 26 22 9 10 20 28 26 1 27 8 35 3 4 6 25 14 9 33 44 15 26 28 34 24 18 48 5 33 11 37 32 19 14 41 6 46 60 8 25 62 32 59 27 54 50 62 44 51 18 53 46 42 31 26 11 78 71 40 60 2 13 35 84 34 76 51 88 33 13 88 85 80 70 21 74 54 79 75...

output:

11527

result:

ok 1 number(s): "11527"

Test #5:

score: 10
Accepted
time: 1400ms
memory: 69536kb

input:

1
2000000
1 1 1 4 5 5 3 6 4 1 11 2 11 4 15 11 11 11 1 16 11 15 22 6 7 23 4 5 8 2 27 1 5 3 15 30 30 21 34 28 22 24 25 33 45 13 1 46 27 27 39 15 42 44 38 27 52 39 27 58 36 37 29 34 30 44 29 55 17 60 34 30 61 29 61 13 12 67 70 9 67 40 54 72 14 80 42 27 49 88 12 2 53 8 57 93 74 22 22 85 61 79 89 55 23 1...

output:

16384

result:

ok 1 number(s): "16384"

Subtask #3:

score: 30
Accepted

Dependency #1:

100%
Accepted

Test #6:

score: 30
Accepted
time: 79ms
memory: 20084kb

input:

16
4
1 1 3
9
1 2 3 4 5 6 7 8
58
1 2 2 4 5 6 7 8 9 2 10 12 13 5 8 14 17 4 18 20 21 22 8 10 4 23 27 5 26 21 20 28 26 33 35 36 37 38 22 39 41 42 43 44 34 45 47 3 31 48 51 52 53 54 44 44 21
30
1 2 1 4 5 2 6 8 8 2 11 5 9 13 10 16 17 18 12 10 11 19 12 23 23 3 16 26 29
36
1 1 1 2 2 1 2 3 1 10 6 3 12 3 8 9 ...

output:

20841

result:

ok 1 number(s): "20841"

Test #7:

score: 30
Accepted
time: 87ms
memory: 26320kb

input:

1
200000
1 2 3 4 5 6 7 7 9 10 11 12 13 14 15 13 16 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...

output:

195053

result:

ok 1 number(s): "195053"

Test #8:

score: 30
Accepted
time: 81ms
memory: 21648kb

input:

1
200000
1 1 2 2 2 4 4 4 6 10 9 10 11 12 13 15 15 18 19 19 19 20 20 22 23 23 23 24 26 27 28 28 29 34 31 35 33 37 35 40 37 39 43 43 43 46 46 48 48 50 48 52 49 50 53 54 54 56 57 56 61 60 59 60 61 65 64 64 65 69 70 72 73 74 72 73 75 78 76 77 80 79 80 81 81 82 86 84 87 90 88 91 93 93 94 94 94 97 95 100 ...

output:

127754

result:

ok 1 number(s): "127754"

Test #9:

score: 30
Accepted
time: 86ms
memory: 20056kb

input:

1
200000
1 2 3 4 1 3 4 4 4 1 3 2 3 3 3 5 2 1 4 5 4 3 5 3 3 2 2 1 1 2 4 2 4 3 3 1 1 2 4 5 5 5 5 2 1 5 3 4 1 5 2 3 4 5 2 3 3 3 1 2 4 2 2 1 1 2 4 1 3 4 1 4 3 4 4 2 1 4 4 5 1 2 1 1 3 2 4 3 3 3 1 2 3 4 3 1 5 5 2 3 2 2 4 2 2 5 2 2 3 5 1 2 2 1 5 5 3 4 2 1 2 5 3 4 5 5 4 5 1 5 3 3 4 3 5 5 4 2 5 5 2 2 3 3 4 2...

output:

10

result:

ok 1 number(s): "10"

Test #10:

score: 30
Accepted
time: 67ms
memory: 20424kb

input:

1
200000
1 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 ...

output:

66

result:

ok 1 number(s): "66"

Test #11:

score: 30
Accepted
time: 110ms
memory: 19180kb

input:

1
200000
1 2 2 1 5 3 2 7 4 1 5 10 2 3 15 16 13 1 12 13 19 13 19 16 23 9 10 1 23 26 30 7 25 16 25 36 16 27 10 39 40 20 6 5 30 3 46 41 35 30 24 28 28 8 38 25 32 38 29 21 56 17 24 38 5 7 62 58 13 8 11 45 47 55 55 12 64 8 55 7 5 31 73 20 85 83 44 74 58 65 57 66 27 47 66 56 90 39 96 15 37 14 30 61 96 73 ...

output:

8192

result:

ok 1 number(s): "8192"

Test #12:

score: 30
Accepted
time: 81ms
memory: 24336kb

input:

1
200000
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 25 62 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...

output:

199948

result:

ok 1 number(s): "199948"

Subtask #4:

score: 0
Runtime Error

Dependency #1:

100%
Accepted

Dependency #2:

100%
Accepted

Dependency #3:

100%
Accepted

Test #13:

score: 50
Accepted
time: 1189ms
memory: 83652kb

input:

13
397
1 2 3 1 4 4 6 2 8 10 11 12 13 5 14 16 17 18 19 20 17 21 7 23 25 26 18 16 22 11 27 18 28 32 35 36 17 37 39 40 28 17 41 23 44 16 13 13 46 50 51 16 16 52 55 56 21 57 59 38 28 9 18 60 65 22 66 68 69 70 71 72 73 9 74 76 77 78 79 80 81 25 82 84 25 85 87 88 51 89 91 87 92 94 95 42 96 98 59 99 101 10...

output:

523799

result:

ok 1 number(s): "523799"

Test #14:

score: 0
Runtime Error

input:

1
2000000
1 1 2 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 5 21 23 24 25 26 27 28 29 30 31 32 33 19 34 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 44 62 64 65 63 66 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 14 20 88 91 92 93 94 95 96 97 98 99 100...

output:


result: