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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#188181#6638. TreelectionrsjWA 1060ms66180kbC++141.2kb2023-09-25 16:20:282023-09-25 16:20:29

Judging History

你现在查看的是最新测评结果

  • [2023-09-25 16:20:29]
  • 评测
  • 测评结果:WA
  • 用时:1060ms
  • 内存:66180kb
  • [2023-09-25 16:20:28]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
const int N = 1e6+10;
struct edge {
	int to;
	edge *nex; 
}*head[N];
void add(int u,int v) {
	edge *cur=new edge;
	cur->to=v;
	cur->nex=head[u];
	head[u]=cur;
}
int fa[N],siz[N],ans[N],f[N],g[N];
void dfs(int u) {
	siz[u]=1;
	for(edge *cur=head[u];cur;cur=cur->nex) {
		dfs(cur->to);
		siz[u]+=siz[cur->to];
	}
}
int count(int u,int lim) {
	int ans=0;
	for(edge *cur=head[u];cur;cur=cur->nex) {
		ans+=count(cur->to,lim)+1;
	}
	ans=max(ans-lim,0);
	return f[u]=ans;
}
void get() {
	int n,i;
	cin>>n;
	for(i=1;i<=n;i++) head[i]=0,ans[i]=0,f[i]=g[i]=siz[i]=0;
	for(i=2;i<=n;i++) cin>>fa[i],add(fa[i],i);
	dfs(1);
	int l=1,r=n,m;
	while(l<=r) {
		m=(l+r)/2;
		if(count(1,m)==0) r=m-1;
		else l=m+1;
	} m=r+1;
	//cout<<"ANS="<<m<<endl;
	//for(i=1;i<=n;i++) cout<<siz[i]<<" "; cout<<endl;
	for(i=1;i<=n;i++) if(siz[i]-1>m) ans[i]=1;
	int cnt=n;
	for(i=1;i<=n;i++) if(siz[i]==1) cnt--;
	count(1,m-1);
	if(f[1]-1==0) {
		g[1]=1;
		for(i=2;i<=n;i++) {
			if(g[fa[i]]&&f[i]) {
				g[i]=1;
				if(siz[i]-1==m) ans[i]=1;
			}
		}
	} for(i=1;i<=n;i++) cout<<ans[i]; cout<<endl;
}
int main() {
	int T; cin>>T; while(T--) get();
	return 0;
}

Details

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Test #1:

score: 100
Accepted
time: 1ms
memory: 7664kb

input:

2
4
1 2 3
5
1 1 2 2

output:

1100
10000

result:

ok 2 lines

Test #2:

score: 0
Accepted
time: 264ms
memory: 39196kb

input:

10
100000
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 10...

output:

111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

result:

ok 10 lines

Test #3:

score: 0
Accepted
time: 301ms
memory: 66180kb

input:

1
1000000
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 10...

output:

111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

result:

ok single line: '111111111111111111111111111111...0000000000000000000000000000000'

Test #4:

score: 0
Accepted
time: 1060ms
memory: 62020kb

input:

1
1000000
1 2 2 3 5 1 7 3 9 8 4 11 9 6 10 12 10 13 16 18 14 16 7 24 23 21 14 8 26 27 17 21 33 24 20 17 5 34 29 34 37 20 12 22 39 44 33 37 32 27 31 25 30 46 39 26 53 4 11 55 41 29 6 22 32 36 52 57 65 38 59 67 51 56 30 61 36 64 62 19 51 63 53 83 38 75 31 41 49 43 60 18 62 67 91 81 44 25 55 98 86 64 46...

output:

111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

result:

ok single line: '111111111111111111111111111111...0000000000000000000000000000000'

Test #5:

score: -100
Wrong Answer
time: 239ms
memory: 38284kb

input:

65764
13
1 1 1 1 1 1 1 1 2 10 10 11
11
1 1 2 2 2 4 4 4 5 10
14
1 2 2 3 3 3 4 4 5 6 10 12 13
14
1 2 2 3 3 3 4 5 5 6 6 7 8
13
1 2 2 3 3 4 5 5 5 6 8 12
13
1 1 1 2 2 3 5 7 7 7 9 9
12
1 1 1 2 2 3 5 7 7 9 10
14
1 1 2 2 3 4 5 6 7 7 8 12 12
14
1 2 3 4 4 5 5 5 7 7 7 10 13
14
1 1 1 1 1 2 2 2 3 10 10 10 11
13
...

output:

1000000000000
11000000000
11101000010000
11100000000000
1110100000000
1010001000000
101000100000
11011001000000
11111010000000
10000000000000
1111010000000
111000100010000
111010001000
11000000000000
11100000000000
11001001000000
11000000000000
11111000000000
110011000000
1010000100000
1100111010000...

result:

wrong answer 8604th lines differ - expected: '10000000000', found: '00000000000'