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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#209999#6638. TreelectionkkioWA 1801ms94500kbC++171.2kb2023-10-10 21:25:372023-10-10 21:25:38

Judging History

你现在查看的是最新测评结果

  • [2023-10-10 21:25:38]
  • 评测
  • 测评结果:WA
  • 用时:1801ms
  • 内存:94500kb
  • [2023-10-10 21:25:37]
  • 提交

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

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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'