QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#718173#9605. 新生舞会thomaswmy40 1192ms98924kbC++142.2kb2024-11-06 19:53:222024-11-06 19:53:22

Judging History

你现在查看的是最新测评结果

  • [2024-11-06 19:53:22]
  • 评测
  • 测评结果:40
  • 用时:1192ms
  • 内存:98924kb
  • [2024-11-06 19:53:22]
  • 提交

answer

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

int T;
int n;
int p[N];
vector<int> sons[N];
int siz[N],son[N];
int f[N],sum[N];
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[N<<3];

int tot;
int stk[N<<3],top;
int rt[N];

int New() {
	int id;
	if(top>0) id=stk[top--];
	else id=++tot;
	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[++top]=q;
	if(k) pushup(p);
	return p;
}

int query(int p,int k) {
	if(!p) return 0;
	if(siz(p)==1<<k+1) return 1<<k+1;
	pushdown(p,k);
	if(siz(ch(p)[0])==1<<k) return (1<<k)+query(ch(p)[1],k-1);
	else return query(ch(p)[0],k-1);
}

void dfs1(int u) {
	siz[u]=1;
	son[u]=0;
	for(int v:sons[u]) {
		dfs1(v);
		if(siz[v]>siz[son[u]]) son[u]=v;
		siz[u]+=siz[v];
	}
}

void dfs2(int u) {
	f[u]=sum[u]=0;
	if(son[u]) {
		dfs2(son[u]);
		rt[u]=rt[son[u]];
		sum[u]^=f[son[u]];
		for(int v:sons[u]) {
			if(v==son[u]) continue;
			dfs2(v);
			rt[u]=mg(rt[u],rt[v],20);
			sum[u]^=f[v];
		}
	}
	else rt[u]=New();
	ins(rt[u],0);
	tag(rt[u])^=sum[u];
	f[u]=query(rt[u],20);
	tag(rt[u])^=f[u];
}

int main() {
	scanf("%d",&T);
	while(T--) {
		scanf("%d",&n);
		for(int i=1;i<=n;i++) sons[i].clear();
		for(int i=2;i<=n;i++) {
			scanf("%d",&p[i]);
			sons[p[i]].push_back(i);
		}
		dfs1(1);
		tot=0,top=0;
		dfs2(1);
		ans^=f[1];
	}
	printf("%d",ans);
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 10
Accepted

Test #1:

score: 10
Accepted
time: 3ms
memory: 65332kb

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: 12ms
memory: 70032kb

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: 13ms
memory: 65556kb

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: 0
Memory Limit Exceeded

Test #4:

score: 10
Accepted
time: 1192ms
memory: 98924kb

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: 0
Memory Limit Exceeded

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:


Subtask #3:

score: 30
Accepted

Dependency #1:

100%
Accepted

Test #6:

score: 30
Accepted
time: 92ms
memory: 75900kb

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: 105ms
memory: 97116kb

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: 95ms
memory: 83560kb

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: 83ms
memory: 72584kb

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: 78ms
memory: 74880kb

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: 111ms
memory: 75064kb

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: 100ms
memory: 96156kb

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
Skipped

Dependency #1:

100%
Accepted

Dependency #2:

0%