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답안 #965430

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
965430 2024-04-18T14:02:54 Z 12345678 Cat Exercise (JOI23_ho_t4) C++17
41 / 100
 219 ms 94792 KB 
#include <bits/stdc++.h>

using namespace std;

#define ll long long

const ll nx=2e5+5, inf=1e6;

ll n, a[nx], u, v, in[nx], out[nx], rin[nx], t, rt, used[nx], pa[nx], dp[nx], cnt, k[nx];
vector<ll> d[nx], c[nx];

struct node
{
    ll mx, idx, lz;
    node(): mx(0), idx(0), lz(0){}
    node(ll mx, ll idx, ll lz): mx(mx), idx(idx), lz(lz){}
    friend node operator+(const node &a, const node &b)
    {
        if (a.mx>b.mx) return a;
        else return b;
    }
};

struct segtree
{
    node d[4*nx];
    void pushlz(ll l, ll r, ll i)
    {
        d[i].mx+=d[i].lz;
        ll md=(l+r)/2;
        if (l!=r) d[2*i].lz+=d[i].lz, d[2*i+1].lz+=d[i].lz;
        d[i].lz=0;
    }
    void build(ll l, ll r, ll i)
    {
        if (l==r) return d[i]=node(k[l], l, 0), void();
        ll md=(l+r)/2;
        build(l, md, 2*i);
        build(md+1, r, 2*i+1);
        d[i]=d[2*i]+d[2*i+1];
    }
    void update(ll l, ll r, ll i, ll ql, ll qr, ll vl)
    {
        pushlz(l, r, i);
        if (qr<l||r<ql) return;
        if (ql<=l&&r<=qr) return d[i].lz+=vl, pushlz(l, r, i), void();
        ll md=(l+r)/2;
        update(l, md, 2*i, ql ,qr, vl);
        update(md+1, r, 2*i+1, ql, qr, vl);
        d[i]=d[2*i]+d[2*i+1];
    }
    void show(int l, int r, int i)
    {
        pushlz(l, r, i);
        cout<<"debugseg "<<l<<' '<<r<<' '<<d[i].mx<<' '<<d[i].idx<<'\n';
        if (l==r) return;
        int md=(l+r)/2; 
        show(l, md, 2*i);
        show(md+1, r, 2*i+1);
        d[i]=d[2*i]+d[2*i+1];
    }
} s;
 
void dfs(ll u, ll p)
{
    pa[u]=p;
    in[u]=++t;
    rin[t]=u;
    for (auto v:d[u]) if (v!=p) dfs(v, u);
    out[u]=t;
}

void updateoutrange(ll l, ll r, ll vl)
{
    if (l!=1) s.update(1, n, 1, 1, l-1, vl);
    if (r!=n) s.update(1, n, 1, r+1, n, vl);
}

void solve(ll u)
{
    used[u]=1;
    if (u!=pa[u]&&!used[pa[u]])
    {
        s.update(1, n, 1, in[u], out[u], -inf);
        c[u].push_back(rin[s.d[1].idx]);
        solve(rin[s.d[1].idx]);
        s.update(1, n, 1, in[u], out[u], inf);
    }
    for (auto v:d[u])
    {
        if (used[v]) continue;
        updateoutrange(in[v], out[v], -inf);
        //cout<<"edge "<<u<<' '<<v<<' '<<in[v]<<' '<<out[v]<<'\n';
        //s.show(1, n, 1);
        c[u].push_back(rin[s.d[1].idx]);
        solve(rin[s.d[1].idx]);
        //cout<<"debug  "<<u<<' '<<s.d[1].idx<<'\n';
        updateoutrange(in[v], out[v], inf);
    }
}

void dfs2(int u)
{
    for (auto v:c[u]) dfs2(v), dp[u]=max(dp[u], dp[v]+abs(v-u));
}

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n;
    for (ll i=1; i<=n; i++) cin>>a[i];
    for (int i=1; i<=n; i++) if (a[i]==n) rt=i;
    for (ll i=1; i<n; i++) cin>>u>>v, d[u].push_back(v), d[v].push_back(u);
    dfs(rt, rt);
    for (int i=1; i<=n; i++) k[in[i]]=a[i];
    s.build(1, n, 1);
    solve(rt);
    /*
    for (int i=1; i<=n; i++)
    {
        cout<<"c "<<i<<':';
        for (auto x:c[i]) cout<<x<<' ';
        cout<<'\n';
    }*/
    dfs2(rt);
    cout<<dp[rt];
}

Compilation message

Main.cpp: In member function 'void segtree::pushlz(long long int, long long int, long long int)':
Main.cpp:30:12: warning: unused variable 'md' [-Wunused-variable]
   30 |         ll md=(l+r)/2;
      |            ^~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 35420 KB Output is correct
2 Correct 6 ms 35420 KB Output is correct
3 Correct 6 ms 35520 KB Output is correct
4 Correct 6 ms 35420 KB Output is correct
5 Correct 7 ms 35472 KB Output is correct
6 Correct 7 ms 35424 KB Output is correct
7 Correct 6 ms 35420 KB Output is correct
8 Correct 6 ms 35420 KB Output is correct
9 Correct 6 ms 35416 KB Output is correct
10 Correct 9 ms 35420 KB Output is correct

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 35420 KB Output is correct
2 Correct 6 ms 35420 KB Output is correct
3 Correct 6 ms 35520 KB Output is correct
4 Correct 6 ms 35420 KB Output is correct
5 Correct 7 ms 35472 KB Output is correct
6 Correct 7 ms 35424 KB Output is correct
7 Correct 6 ms 35420 KB Output is correct
8 Correct 6 ms 35420 KB Output is correct
9 Correct 6 ms 35416 KB Output is correct
10 Correct 9 ms 35420 KB Output is correct
11 Correct 6 ms 35420 KB Output is correct
12 Correct 6 ms 35420 KB Output is correct
13 Correct 7 ms 35512 KB Output is correct
14 Correct 8 ms 35420 KB Output is correct
15 Correct 6 ms 35548 KB Output is correct
16 Correct 6 ms 35420 KB Output is correct
17 Correct 6 ms 35420 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 35420 KB Output is correct
2 Correct 6 ms 35420 KB Output is correct
3 Correct 6 ms 35520 KB Output is correct
4 Correct 6 ms 35420 KB Output is correct
5 Correct 7 ms 35472 KB Output is correct
6 Correct 7 ms 35424 KB Output is correct
7 Correct 6 ms 35420 KB Output is correct
8 Correct 6 ms 35420 KB Output is correct
9 Correct 6 ms 35416 KB Output is correct
10 Correct 9 ms 35420 KB Output is correct
11 Correct 6 ms 35420 KB Output is correct
12 Correct 6 ms 35420 KB Output is correct
13 Correct 7 ms 35512 KB Output is correct
14 Correct 8 ms 35420 KB Output is correct
15 Correct 6 ms 35548 KB Output is correct
16 Correct 6 ms 35420 KB Output is correct
17 Correct 6 ms 35420 KB Output is correct
18 Correct 10 ms 36956 KB Output is correct
19 Correct 17 ms 30812 KB Output is correct
20 Correct 14 ms 30716 KB Output is correct
21 Correct 10 ms 30296 KB Output is correct
22 Correct 12 ms 30044 KB Output is correct
23 Correct 12 ms 30040 KB Output is correct
24 Correct 10 ms 30044 KB Output is correct

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 35420 KB Output is correct
2 Correct 6 ms 35420 KB Output is correct
3 Correct 6 ms 35520 KB Output is correct
4 Correct 6 ms 35420 KB Output is correct
5 Correct 7 ms 35472 KB Output is correct
6 Correct 7 ms 35424 KB Output is correct
7 Correct 6 ms 35420 KB Output is correct
8 Correct 6 ms 35420 KB Output is correct
9 Correct 6 ms 35416 KB Output is correct
10 Correct 9 ms 35420 KB Output is correct
11 Correct 6 ms 35420 KB Output is correct
12 Correct 6 ms 35420 KB Output is correct
13 Correct 7 ms 35512 KB Output is correct
14 Correct 8 ms 35420 KB Output is correct
15 Correct 6 ms 35548 KB Output is correct
16 Correct 6 ms 35420 KB Output is correct
17 Correct 6 ms 35420 KB Output is correct
18 Correct 10 ms 36956 KB Output is correct
19 Correct 17 ms 30812 KB Output is correct
20 Correct 14 ms 30716 KB Output is correct
21 Correct 10 ms 30296 KB Output is correct
22 Correct 12 ms 30044 KB Output is correct
23 Correct 12 ms 30040 KB Output is correct
24 Correct 10 ms 30044 KB Output is correct
25 Incorrect 8 ms 29272 KB Output isn't correct
26 Halted 0 ms 0 KB -

Subtask #5
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 35420 KB Output is correct
2 Correct 6 ms 35420 KB Output is correct
3 Correct 6 ms 35520 KB Output is correct
4 Correct 6 ms 35420 KB Output is correct
5 Correct 7 ms 35472 KB Output is correct
6 Correct 7 ms 35424 KB Output is correct
7 Correct 6 ms 35420 KB Output is correct
8 Correct 6 ms 35420 KB Output is correct
9 Correct 6 ms 35416 KB Output is correct
10 Correct 9 ms 35420 KB Output is correct
11 Correct 6 ms 35420 KB Output is correct
12 Correct 6 ms 35420 KB Output is correct
13 Correct 7 ms 35512 KB Output is correct
14 Correct 8 ms 35420 KB Output is correct
15 Correct 6 ms 35548 KB Output is correct
16 Correct 6 ms 35420 KB Output is correct
17 Correct 6 ms 35420 KB Output is correct
18 Correct 10 ms 36956 KB Output is correct
19 Correct 17 ms 30812 KB Output is correct
20 Correct 14 ms 30716 KB Output is correct
21 Correct 10 ms 30296 KB Output is correct
22 Correct 12 ms 30044 KB Output is correct
23 Correct 12 ms 30040 KB Output is correct
24 Correct 10 ms 30044 KB Output is correct
25 Correct 210 ms 94792 KB Output is correct
26 Correct 213 ms 90960 KB Output is correct
27 Correct 199 ms 91032 KB Output is correct
28 Correct 219 ms 62196 KB Output is correct
29 Correct 192 ms 63572 KB Output is correct
30 Correct 194 ms 63184 KB Output is correct
31 Correct 192 ms 63740 KB Output is correct

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 35752 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 35420 KB Output is correct
2 Correct 6 ms 35420 KB Output is correct
3 Correct 6 ms 35520 KB Output is correct
4 Correct 6 ms 35420 KB Output is correct
5 Correct 7 ms 35472 KB Output is correct
6 Correct 7 ms 35424 KB Output is correct
7 Correct 6 ms 35420 KB Output is correct
8 Correct 6 ms 35420 KB Output is correct
9 Correct 6 ms 35416 KB Output is correct
10 Correct 9 ms 35420 KB Output is correct
11 Correct 6 ms 35420 KB Output is correct
12 Correct 6 ms 35420 KB Output is correct
13 Correct 7 ms 35512 KB Output is correct
14 Correct 8 ms 35420 KB Output is correct
15 Correct 6 ms 35548 KB Output is correct
16 Correct 6 ms 35420 KB Output is correct
17 Correct 6 ms 35420 KB Output is correct
18 Correct 10 ms 36956 KB Output is correct
19 Correct 17 ms 30812 KB Output is correct
20 Correct 14 ms 30716 KB Output is correct
21 Correct 10 ms 30296 KB Output is correct
22 Correct 12 ms 30044 KB Output is correct
23 Correct 12 ms 30040 KB Output is correct
24 Correct 10 ms 30044 KB Output is correct
25 Incorrect 8 ms 29272 KB Output isn't correct
26 Halted 0 ms 0 KB -