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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#401212#946. Magic Treesichengzhou#0 75ms21324kbC++143.9kb2024-04-28 08:46:522024-04-28 08:47:31

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你现在查看的是最新测评结果

  • [2024-04-28 08:47:31]
  • 评测
  • 测评结果:0
  • 用时:75ms
  • 内存:21324kb
  • [2024-04-28 08:46:52]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
const int N=1e5+5,M=22;
int n,m,K,fa[N],d[N],w[N];
struct Edge{
    int v,nxt;
}e[N];
int h[N],tot1;
void addEdge(int u,int v)
{
    tot1++;
    e[tot1].v=v;e[tot1].nxt=h[u];
    h[u]=tot1;
}
struct Seg{
    int l,r;
    LL val,mx,lz;
}t[N<<2];
vector<pair<int,LL> >f[N];
void update(int p)
{
    t[p].val=max(t[p<<1].val,t[p<<1|1].val);
}
void pushlz(int p,LL z)
{
    t[p].val+=z;
    t[p].lz+=z;
}
void pushmx(int p,LL z)
{
    t[p].val=z;
    t[p].mx=z;
    t[p].lz=0;
}
void lzdown(int p)
{
    if(t[p].l)
    {
        if(t[p].mx)pushmx(t[p].l,t[p].mx);
        pushlz(t[p].l,t[p].lz);
    }
    if(t[p].r)
    {
        if(t[p].mx)pushmx(t[p].r,t[p].mx);
        pushlz(t[p].r,t[p].lz);
    }
    t[p].mx=0;t[p].lz=0;
}
LL val;
LL add(int p,int l,int r,int x,int y,LL z)
{
    if(x<=l&&r<=y)
    {
        pushlz(p,z);
        return t[p].val;
    }
    lzdown(p);
    int mid=l+r>>1;
    LL ret=0;
    if(x<=mid)
    {
        ret=add(p<<1,l,mid,x,y,z);
    }
    if(mid+1<=y)
    {
        ret=add(p<<1|1,mid+1,r,x,y,z);
    }
    update(p);
    return ret;
}
void change(int p,int l,int r,int x,int y,LL z)
{
    if(x>y)return ;
    if(x<=l&&r<=y)
    {
        if(l==r)
        {
            if(t[p].val<z)
            {
                pushmx(p,z);
            }
            return ;
        }
        lzdown(p);
        int mid=l+r>>1;
        if(t[p<<1].val<z)
        {
            pushmx(p<<1,z);
            change(p<<1|1,mid+1,r,x,y,z);
        }else{
            change(p<<1,l,mid,x,y,z);
        }
        return ;
    }
    lzdown(p);
    int mid=l+r>>1;
    if(x<=mid)
    {
        change(p<<1,l,mid,x,y,z);
    }
    if(mid+1<=y)
    {
        change(p<<1|1,mid+1,r,x,y,z);
    }
    update(p);
}
LL query(int p,int l,int r,int x)
{
    if(l==r)
    {
        return t[p].val;
    }
    lzdown(p);
    int mid=l+r>>1;
    if(x<=mid)
    {
        return query(p<<1,l,mid,x);
    }else{
        return query(p<<1|1,mid+1,r,x);
    }
}
int sz[N],son[N],dfn[N],rnk[N],idx;
void dfs0(int u)
{
    dfn[u]=++idx;rnk[idx]=u;
    sz[u]=1;son[u]=0;
    for(int i=h[u];i;i=e[i].nxt)
    {
        int v=e[i].v;
        if(v==fa[u])
        {
            continue;
        }
        fa[v]=u;
        dfs0(v);
        sz[u]+=sz[v];
        if(sz[v]>sz[son[u]])
        {
            son[u]=v;
        }
    }
}
void dfs(int u)
{
//    cout<<u<<"b\n";
    for(int i=h[u];i;i=e[i].nxt)
    {
        int v=e[i].v;
        if(v==son[u])
        {
            continue;
        }
        dfs(v);
    }
    if(son[u])
    {
        dfs(son[u]);
    }
    for(int i=h[u];i;i=e[i].nxt)
    {
        int v=e[i].v;
        if(v==son[u])
        {
            continue;
        }
        LL pre=0;
        for(int j=0;j<f[v].size();j++)
        {
            add(1,1,K,f[v][j].first,K,f[v][j].second-pre);
            pre=f[v][j].second;
        }
    }
    if(w[u])
    {
        LL val=add(1,1,K,d[u],d[u],w[u]);
        change(1,1,K,d[u]+1,K,val);
    }
    if(son[fa[u]]!=u)
    {
        for(int i=dfn[u];i<=dfn[u]+sz[u]-1;i++)
        {
            int v=rnk[i];
            if(w[v])
            {
                f[u].push_back(make_pair(d[v],0));
            }
        }
        sort(f[u].begin(),f[u].end());
        unique(f[u].begin(),f[u].end());
        for(int i=0;i<f[u].size();i++)
        {
            f[u][i].second=query(1,1,K,f[u][i].first);
        }
        pushmx(1,0);
    }
//    cout<<u<<"e\n";
}
int main()
{
    int x;
    scanf("%d%d%d",&n,&m,&K);
    for(int i=2;i<=n;i++)
    {
        scanf("%d",&fa[i]);
        addEdge(fa[i],i);
    }
    for(int i=1;i<=m;i++)
    {
        scanf("%d",&x);
        scanf("%d%d",&d[x],&w[x]);
    }
    dfs0(1);
    dfs(1);
    printf("%lld\n",f[1][f[1].size()-1].second);
    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 0
Wrong Answer

Test #1:

score: 0
Wrong Answer
time: 0ms
memory: 8012kb

input:

10 9 10
1
1
2
2
3
1
3
8
3
5 4 1
9 4 1
6 8 1
3 1 1
4 9 1
10 1 1
2 6 1
8 7 1
7 9 1

output:

2

result:

wrong answer expected '7', found '2'

Subtask #2:

score: 0
Wrong Answer

Test #10:

score: 0
Wrong Answer
time: 75ms
memory: 21160kb

input:

100000 25000 100000
1
1
2
1
2
1
5
8
8
2
5
2
2
3
1
2
11
10
18
2
9
9
9
8
1
19
18
22
20
17
20
13
30
5
9
8
13
2
19
26
14
31
23
22
2
21
8
1
22
9
50
19
49
42
47
19
21
57
9
52
41
39
10
14
60
56
34
17
18
22
53
5
34
64
29
72
33
11
9
67
58
10
58
70
57
26
65
10
15
64
67
20
26
13
51
81
11
78
40
53
70
33
34
92
7...

output:

23322526970

result:

wrong answer expected '12471468294549', found '23322526970'

Subtask #3:

score: 0
Wrong Answer

Test #15:

score: 0
Wrong Answer
time: 2ms
memory: 10116kb

input:

1000 500 1000
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
9...

output:

1

result:

wrong answer expected '3', found '1'

Subtask #4:

score: 0
Wrong Answer

Test #21:

score: 0
Wrong Answer
time: 45ms
memory: 21324kb

input:

100000 90000 2
1
1
3
2
1
2
1
5
1
8
11
9
1
8
12
7
1
2
7
6
12
9
16
18
13
10
23
27
26
17
23
10
24
11
21
13
30
1
11
6
13
8
30
15
17
34
39
41
32
29
27
17
21
12
26
33
10
50
29
17
46
33
21
28
47
26
3
67
38
5
10
45
61
70
59
17
46
40
20
58
67
68
15
62
71
71
57
32
81
18
66
7
14
51
67
92
86
38
88
60
45
54
5
59...

output:

-542508469584869850

result:

wrong answer expected '38521956905095', found '-542508469584869850'

Subtask #5:

score: 0
Skipped

Dependency #1:

0%

Subtask #6:

score: 0
Wrong Answer

Test #31:

score: 0
Wrong Answer
time: 7ms
memory: 11476kb

input:

20000 800 60000
1
1
1
2
3
1
7
8
6
1
7
6
1
7
14
16
11
13
14
3
11
11
4
2
5
24
20
24
16
30
15
3
24
31
12
7
2
29
14
25
39
23
16
33
32
33
34
9
13
37
33
23
15
21
28
39
51
19
6
50
54
55
8
40
3
7
34
19
28
15
61
18
22
28
38
15
47
37
42
73
38
61
10
7
30
58
41
43
69
89
62
84
30
68
92
84
43
59
44
75
8
100
83
18...

output:

-11454360730

result:

wrong answer expected '386917987664', found '-11454360730'

Subtask #7:

score: 0
Skipped

Dependency #3:

0%

Subtask #8:

score: 0
Skipped

Dependency #1:

0%