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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#209999 | #6638. Treelection | kkio | WA | 1801ms | 94500kb | C++17 | 1.2kb | 2023-10-10 21:25:37 | 2023-10-10 21:25:38 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
const int maxn=1e6+10;
int n,p[maxn],f[maxn];
vector<int> G[maxn];
int L,tag[maxn];
void dfs(int u,int fa)
{
int sum=0;
for(int v:G[u])
if(v!=fa)
dfs(v,u),sum+=f[v];
if(sum-L<=0)tag[u]=0;
f[u]=(u!=1)+max(0,sum-L);
}
int siz[maxn],S[maxn];
void sdfs(int u,int fa)
{
siz[u]=0;
for(int v:G[u])
if(v!=fa)
{
sdfs(v,u);
tag[v]&=tag[u];
siz[u]+=siz[v];
}
S[u]=siz[u];
siz[u]++;
}
char ans[maxn];
void solve()
{
scanf("%d",&n);
for(int i=1;i<=n;i++)G[i].clear();
for(int i=2;i<=n;i++)
scanf("%d",&p[i]),G[p[i]].push_back(i),G[i].push_back(p[i]);
int l=1,r=n,mid,z;
while(l<=r)
{
mid=l+r>>1;
L=mid;
dfs(1,0);
if(f[1]==0)z=mid,r=mid-1;
else l=mid+1;
}
L=z-1;
for(int i=1;i<=n;i++)tag[i]=1;
dfs(1,0);
sdfs(1,0);
for(int i=1;i<=n;i++)
if(S[i]>z||(S[i]==z&&tag[i]&&f[1]==1))ans[i]='1';
else ans[i]='0';
for(int i=1;i<=n;i++)putchar(ans[i]);putchar('\n');
}
int main()
{
int T;scanf("%d",&T);
while(T--)solve();
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 4ms
memory: 38676kb
input:
2 4 1 2 3 5 1 1 2 2
output:
1100 10000
result:
ok 2 lines
Test #2:
score: 0
Accepted
time: 173ms
memory: 43428kb
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: 278ms
memory: 94500kb
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: 1801ms
memory: 81552kb
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: 175ms
memory: 42204kb
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 714th lines differ - expected: '11010001000000', found: '11010001010000'