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답안 #1013725

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1013725 2024-07-04T03:50:45 Z 12345678 Tourism (JOI23_tourism) C++17
28 / 100
 5000 ms 19244 KB 
#include <bits/stdc++.h>

using namespace std;

const int nx=1e5+5, kx=17;

int n, m, q, u, v, in[nx], out[nx], pa[nx][kx], t, c[nx], l=1, r=1, a[nx], b[nx], ans, lvl[nx];
vector<int> d[nx];

void dfs(int u, int p)
{
    pa[u][0]=p;
    lvl[u]=lvl[p]+1;
    for (int i=1; i<kx; i++) pa[u][i]=pa[pa[u][i-1]][i-1];
    in[u]=++t;
    for (auto v:d[u]) if (v!=p) dfs(v, u);
    out[u]=t;
}

struct segtree
{
    int d[4*nx];
    void update(int l, int r, int i, int idx, int vl)
    {
        if (idx<l||r<idx) return;
        if (l==r) return d[i]+=vl, void();
        int md=(l+r)/2;
        update(l, md, 2*i, idx, vl);
        update(md+1, r, 2*i+1, idx, vl);
        d[i]=d[2*i]+d[2*i+1];
    }
    int query(int l, int r, int i, int ql, int qr)
    {
        if (qr<l||r<ql) return 0;
        if (ql<=l&&r<=qr) return d[i];
        int md=(l+r)/2;
        return query(l, md, 2*i, ql, qr)+query(md+1, r, 2*i+1, ql, qr);
    }
} s;

int getlca()
{
    if (s.query(1, n, 1, in[c[l]], in[c[l]])==1) u=c[l];
    else u=c[l+1];
    int cur=s.query(1, n, 1, in[1], out[1]);
    if (s.query(1, n, 1, in[u], out[u])==cur) return u;
    for (int i=kx-1; i>=0; i--) if (s.query(1, n, 1, in[pa[u][i]], out[pa[u][i]])!=cur) u=pa[u][i];
    return pa[u][0];
}

void add(int u)
{
    int v=u, lca=getlca();
    if (s.query(1, n, 1, in[u], out[u])>0) 
    {
        if (lvl[lca]<=lvl[u]) return s.update(1, n, 1, in[u], 1), void();
        ans+=lvl[lca]-lvl[u];
        s.update(1, n, 1, in[u], 1);
        return;
    }
    for (int i=kx-1; i>=0; i--) if (s.query(1, n, 1, in[pa[v][i]], out[pa[v][i]])==0) v=pa[v][i];
    v=pa[v][0];
    if (lvl[lca]<=lvl[v]) ans+=lvl[u]-lvl[v], s.update(1, n, 1, in[u], 1);
    else ans+=lvl[u]-lvl[v]+lvl[pa[lca][0]]-lvl[v]+1, s.update(1, n, 1, in[u], 1);
}

void rem(int u)
{
    s.update(1, n, 1, in[u], -1);
    int v=u, lca=getlca();
    if (s.query(1, n, 1, in[u], out[u])>0) 
    {
        if (lvl[lca]<=lvl[u]) return;
        ans-=lvl[lca]-lvl[u];
        return;
    }
    for (int i=kx-1; i>=0; i--) if (s.query(1, n, 1, in[pa[v][i]], out[pa[v][i]])==0) v=pa[v][i];
    v=pa[v][0];
    if (lvl[lca]<=lvl[v]) ans-=lvl[u]-lvl[v];
    else ans-=lvl[u]-lvl[v]+lvl[pa[lca][0]]-lvl[v]+1;

}

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>m>>q;
    for (int i=1; i<n; i++) cin>>u>>v, d[u].push_back(v), d[v].push_back(u);
    dfs(1, 1);
    for (int i=1; i<=m; i++) cin>>c[i];
    ans=1;
    s.update(1, n, 1, in[c[1]], 1);
    for (int i=1; i<=q; i++)
    {
        cin>>a[i]>>b[i];
        while (l>a[i]) add(c[--l]);
        while (r<b[i]) add(c[++r]);
        while (l<a[i]) rem(c[l++]);
        while (r>b[i]) rem(c[r--]);
        cout<<ans<<'\n';
    }
}

/*
8 8 2
1 2
2 3
3 4
4 5
5 6
6 7
7 8
8 6 4 3 5 2 4 7
2 8
1 2
*/

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 13 ms 2880 KB Output is correct
5 Correct 9 ms 2652 KB Output is correct
6 Correct 11 ms 2652 KB Output is correct
7 Correct 16 ms 2652 KB Output is correct
8 Correct 9 ms 2652 KB Output is correct
9 Correct 22 ms 2652 KB Output is correct
10 Correct 29 ms 2648 KB Output is correct
11 Correct 22 ms 2652 KB Output is correct
12 Correct 2 ms 2652 KB Output is correct
13 Correct 2 ms 2652 KB Output is correct
14 Correct 3 ms 2652 KB Output is correct
15 Correct 17 ms 2904 KB Output is correct
16 Correct 13 ms 2904 KB Output is correct
17 Correct 21 ms 2652 KB Output is correct
18 Correct 20 ms 2908 KB Output is correct
19 Correct 22 ms 2652 KB Output is correct
20 Correct 17 ms 2904 KB Output is correct
21 Correct 16 ms 2652 KB Output is correct
22 Correct 16 ms 2904 KB Output is correct
23 Correct 15 ms 2900 KB Output is correct
24 Correct 16 ms 2904 KB Output is correct
25 Correct 14 ms 2908 KB Output is correct
26 Correct 14 ms 2652 KB Output is correct
27 Correct 1 ms 2652 KB Output is correct
28 Correct 2 ms 2652 KB Output is correct
29 Correct 31 ms 2848 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 13 ms 2880 KB Output is correct
5 Correct 9 ms 2652 KB Output is correct
6 Correct 11 ms 2652 KB Output is correct
7 Correct 16 ms 2652 KB Output is correct
8 Correct 9 ms 2652 KB Output is correct
9 Correct 22 ms 2652 KB Output is correct
10 Correct 29 ms 2648 KB Output is correct
11 Correct 22 ms 2652 KB Output is correct
12 Correct 2 ms 2652 KB Output is correct
13 Correct 2 ms 2652 KB Output is correct
14 Correct 3 ms 2652 KB Output is correct
15 Correct 17 ms 2904 KB Output is correct
16 Correct 13 ms 2904 KB Output is correct
17 Correct 21 ms 2652 KB Output is correct
18 Correct 20 ms 2908 KB Output is correct
19 Correct 22 ms 2652 KB Output is correct
20 Correct 17 ms 2904 KB Output is correct
21 Correct 16 ms 2652 KB Output is correct
22 Correct 16 ms 2904 KB Output is correct
23 Correct 15 ms 2900 KB Output is correct
24 Correct 16 ms 2904 KB Output is correct
25 Correct 14 ms 2908 KB Output is correct
26 Correct 14 ms 2652 KB Output is correct
27 Correct 1 ms 2652 KB Output is correct
28 Correct 2 ms 2652 KB Output is correct
29 Correct 31 ms 2848 KB Output is correct
30 Correct 571 ms 3160 KB Output is correct
31 Correct 750 ms 2904 KB Output is correct
32 Correct 1172 ms 3128 KB Output is correct
33 Correct 1332 ms 3128 KB Output is correct
34 Correct 1074 ms 3152 KB Output is correct
35 Correct 30 ms 2908 KB Output is correct
36 Correct 30 ms 3160 KB Output is correct
37 Correct 28 ms 2908 KB Output is correct
38 Correct 1159 ms 3196 KB Output is correct
39 Correct 1002 ms 3164 KB Output is correct
40 Correct 1278 ms 3460 KB Output is correct
41 Correct 38 ms 3164 KB Output is correct
42 Correct 45 ms 3208 KB Output is correct
43 Correct 26 ms 3160 KB Output is correct
44 Correct 1300 ms 3416 KB Output is correct
45 Correct 1089 ms 3128 KB Output is correct
46 Correct 1329 ms 3164 KB Output is correct
47 Correct 33 ms 3164 KB Output is correct
48 Correct 32 ms 3160 KB Output is correct
49 Correct 29 ms 3164 KB Output is correct
50 Correct 796 ms 3132 KB Output is correct
51 Correct 804 ms 3120 KB Output is correct
52 Correct 742 ms 3124 KB Output is correct
53 Correct 783 ms 3376 KB Output is correct
54 Correct 796 ms 3124 KB Output is correct
55 Correct 784 ms 3168 KB Output is correct
56 Correct 28 ms 2652 KB Output is correct
57 Correct 2 ms 2908 KB Output is correct
58 Correct 1624 ms 3112 KB Output is correct

Subtask #3
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 3 ms 2808 KB Output is correct
3 Correct 26 ms 2884 KB Output is correct
4 Execution timed out 5073 ms 13404 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2904 KB Output is correct
2 Correct 167 ms 10588 KB Output is correct
3 Correct 248 ms 11352 KB Output is correct
4 Correct 244 ms 12624 KB Output is correct
5 Correct 120 ms 16800 KB Output is correct
6 Correct 234 ms 16976 KB Output is correct
7 Correct 238 ms 16816 KB Output is correct
8 Correct 288 ms 16976 KB Output is correct
9 Correct 305 ms 17012 KB Output is correct
10 Correct 338 ms 16976 KB Output is correct
11 Correct 369 ms 17020 KB Output is correct
12 Correct 328 ms 16980 KB Output is correct
13 Correct 305 ms 17236 KB Output is correct
14 Correct 305 ms 17628 KB Output is correct
15 Correct 233 ms 19244 KB Output is correct
16 Correct 290 ms 17232 KB Output is correct
17 Correct 298 ms 17148 KB Output is correct
18 Correct 356 ms 17232 KB Output is correct
19 Correct 193 ms 17232 KB Output is correct
20 Correct 246 ms 16988 KB Output is correct
21 Correct 218 ms 16724 KB Output is correct
22 Correct 238 ms 16980 KB Output is correct
23 Correct 288 ms 16988 KB Output is correct
24 Correct 328 ms 16948 KB Output is correct
25 Correct 342 ms 16972 KB Output is correct
26 Correct 447 ms 16988 KB Output is correct
27 Correct 498 ms 17004 KB Output is correct
28 Correct 560 ms 16984 KB Output is correct
29 Correct 613 ms 16976 KB Output is correct
30 Correct 602 ms 17064 KB Output is correct
31 Correct 599 ms 17108 KB Output is correct
32 Correct 591 ms 17232 KB Output is correct
33 Correct 519 ms 17940 KB Output is correct
34 Correct 417 ms 18936 KB Output is correct

Subtask #5
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 25 ms 2652 KB Output is correct
4 Execution timed out 5094 ms 11100 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #6
0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 13 ms 2880 KB Output is correct
5 Correct 9 ms 2652 KB Output is correct
6 Correct 11 ms 2652 KB Output is correct
7 Correct 16 ms 2652 KB Output is correct
8 Correct 9 ms 2652 KB Output is correct
9 Correct 22 ms 2652 KB Output is correct
10 Correct 29 ms 2648 KB Output is correct
11 Correct 22 ms 2652 KB Output is correct
12 Correct 2 ms 2652 KB Output is correct
13 Correct 2 ms 2652 KB Output is correct
14 Correct 3 ms 2652 KB Output is correct
15 Correct 17 ms 2904 KB Output is correct
16 Correct 13 ms 2904 KB Output is correct
17 Correct 21 ms 2652 KB Output is correct
18 Correct 20 ms 2908 KB Output is correct
19 Correct 22 ms 2652 KB Output is correct
20 Correct 17 ms 2904 KB Output is correct
21 Correct 16 ms 2652 KB Output is correct
22 Correct 16 ms 2904 KB Output is correct
23 Correct 15 ms 2900 KB Output is correct
24 Correct 16 ms 2904 KB Output is correct
25 Correct 14 ms 2908 KB Output is correct
26 Correct 14 ms 2652 KB Output is correct
27 Correct 1 ms 2652 KB Output is correct
28 Correct 2 ms 2652 KB Output is correct
29 Correct 31 ms 2848 KB Output is correct
30 Correct 571 ms 3160 KB Output is correct
31 Correct 750 ms 2904 KB Output is correct
32 Correct 1172 ms 3128 KB Output is correct
33 Correct 1332 ms 3128 KB Output is correct
34 Correct 1074 ms 3152 KB Output is correct
35 Correct 30 ms 2908 KB Output is correct
36 Correct 30 ms 3160 KB Output is correct
37 Correct 28 ms 2908 KB Output is correct
38 Correct 1159 ms 3196 KB Output is correct
39 Correct 1002 ms 3164 KB Output is correct
40 Correct 1278 ms 3460 KB Output is correct
41 Correct 38 ms 3164 KB Output is correct
42 Correct 45 ms 3208 KB Output is correct
43 Correct 26 ms 3160 KB Output is correct
44 Correct 1300 ms 3416 KB Output is correct
45 Correct 1089 ms 3128 KB Output is correct
46 Correct 1329 ms 3164 KB Output is correct
47 Correct 33 ms 3164 KB Output is correct
48 Correct 32 ms 3160 KB Output is correct
49 Correct 29 ms 3164 KB Output is correct
50 Correct 796 ms 3132 KB Output is correct
51 Correct 804 ms 3120 KB Output is correct
52 Correct 742 ms 3124 KB Output is correct
53 Correct 783 ms 3376 KB Output is correct
54 Correct 796 ms 3124 KB Output is correct
55 Correct 784 ms 3168 KB Output is correct
56 Correct 28 ms 2652 KB Output is correct
57 Correct 2 ms 2908 KB Output is correct
58 Correct 1624 ms 3112 KB Output is correct
59 Correct 1 ms 2648 KB Output is correct
60 Correct 3 ms 2808 KB Output is correct
61 Correct 26 ms 2884 KB Output is correct
62 Execution timed out 5073 ms 13404 KB Time limit exceeded
63 Halted 0 ms 0 KB -