QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#188181 | #6638. Treelection | rsj | WA | 1060ms | 66180kb | C++14 | 1.2kb | 2023-09-25 16:20:28 | 2023-09-25 16:20:29 |
Judging History
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
Tip: Click on the bar to expand more detailed information
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'