oj.uz

답안 #767724

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
767724 2023-06-27T05:50:29 Z PurpleCrayon Tourism (JOI23_tourism) C++17
28 / 100
 5000 ms 45844 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define sz(v) int(v.size())
#define ar array
typedef long long ll;
const int N = 1e5+10, MOD = 1e9+7;
const int L = 19;

int n, m, q, st[N], en[N], depth[N], tt = 0;
vector<int> adj[N];

vector<int> lca_et;
int sparse[2 * N][L], st_lca[N], en_lca[N];

int dep_min(int a, int b) {
    return depth[a] < depth[b] ? a : b;
}

void build_rmq() {
    int k = sz(lca_et);
    for (int i = 0; i < k; i++) sparse[i][0] = lca_et[i];
    for (int c = 2, l = 1; c <= k; c *= 2, l++) {
        for (int i = 0; i + c <= k; i++) {
            sparse[i][l] = dep_min(sparse[i][l-1], sparse[i + c/2][l-1]);
        }
    }
}

int rmq_qry(int l, int r) {
    int lg = 31 - __builtin_clz(r - l + 1);
    int len = 1 << lg;
    return dep_min(sparse[l][lg], sparse[r - len + 1][lg]);
}

int lca(int a, int b) {
    if (st_lca[a] > st_lca[b]) swap(a, b);
    return rmq_qry(st_lca[a], en_lca[b]);
}

void dfs(int c, int p) {
    if (p != -1) depth[c] = depth[p] + 1;
    st[c] = tt++;

    st_lca[c] = en_lca[c] = sz(lca_et);
    lca_et.push_back(c);
    for (int nxt : adj[c]) if (nxt != p) {
        dfs(nxt, c);

        en_lca[c] = sz(lca_et);
        lca_et.push_back(c);
    }

    en[c] = tt-1;
}

int ans[N], c[N], lca_l[N], lca_r[N];
int rev[N], par[N], w[N];
pair<int, int> range[N];
vector<int> aux[N];

void dfs_aux_range(int c) {
    for (int nxt : aux[c]) {
        dfs_aux_range(nxt);
        range[c].first = max(range[c].first, range[nxt].first);
        range[c].second = min(range[c].second, range[nxt].second);
    }
}

void rec(int l, int r, vector<ar<int, 3>> qs) {
    if (!sz(qs)) return;
    if (r <= l) return;

    int m = (l + r) / 2; // [l..m], [m+1..r]
    vector<ar<int, 3>> one, two, mine;
    for (auto qi : qs) {
        if (qi[1] <= m)
            one.push_back(qi);
        else if (qi[0] > m)
            two.push_back(qi);
        else
            mine.push_back(qi);
    }

    rec(l, m, one), rec(m+1, r, two);

    vector<int> use;
    for (int i = l; i <= r; i++) use.push_back(c[i]);

    sort(use.begin(), use.end(), [&](int x, int y) {
        return st[x] < st[y];
    });

    use.resize(unique(use.begin(), use.end()) - use.begin());
    int base = sz(use);
    for (int i = 0; i < base; i++) {
        use.push_back(lca(use[i], use[(i+1) % base]));
    }

    sort(use.begin(), use.end(), [&](int x, int y) {
        return st[x] < st[y];
    });

    use.resize(unique(use.begin(), use.end()) - use.begin());
    for (int i = 0; i < sz(use); i++) {
        rev[use[i]] = i;
        aux[i].clear();
    }

    for (int i = 1; i < sz(use); i++) {
        par[i] = rev[lca(use[i-1], use[i])];
        aux[par[i]].push_back(i);
        w[i] = depth[use[i]] - depth[use[par[i]]];
    }
    
    int k = sz(use);
    // max index of something on the left, min index of something on the right
    for (int i = 0; i < k; i++) {
        range[i] = {-1, MOD};
    }

    for (int i = l; i <= m; i++) {
        int cur = rev[c[i]];
        range[cur].first = max(range[cur].first, i);
    }

    for (int i = m+1; i <= r; i++) {
        int cur = rev[c[i]];
        range[cur].second = min(range[cur].second, i);
    }

    dfs_aux_range(0);
    for (int i = m; i >= l; i--) {
        lca_l[i] = c[i];
        if (i < m) lca_l[i] = lca(lca_l[i], lca_l[i+1]);
    }

    for (int i = m+1; i <= r; i++) {
        lca_r[i] = c[i];
        if (i > m+1) lca_r[i] = lca(lca_r[i], lca_r[i-1]);
    }

    int sum = 0;
    for (int j = 1; j < k; j++) sum += w[j];
    int top = use[0];

    for (auto [L, R, i] : mine) {
        ans[i] += sum;
        ans[i] -= depth[lca(lca_l[L], lca_r[R])] - depth[top];

        for (int j = 1; j < k; j++) {
            if (range[j].first < L && R < range[j].second) {
                ans[i] -= w[j];
            }
        }
    }
}

void solve() {
    cin >> n >> m >> q;
    for (int i = 0; i < n-1; i++) {
        int a, b; cin >> a >> b, --a, --b;
        adj[a].push_back(b), adj[b].push_back(a);
    }

    dfs(0, -1);
    build_rmq();

    for (int i = 0; i < m; i++) {
        cin >> c[i], --c[i];
    }

    vector<ar<int, 3>> qs(q);
    for (int i = 0; i < q; i++) {
        int l, r; cin >> l >> r, --l, --r;
        qs[i] = {l, r, i};
    }

    rec(0, m-1, qs);

    for (int i = 0; i < q; i++) cout << ans[i]+1 << '\n';
}
 
int main() {
    ios::sync_with_stdio(false); cin.tie(0);
    int T = 1;
    // cin >> T;
    while (T--) solve();
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 2 ms 5032 KB Output is correct
3 Correct 3 ms 5032 KB Output is correct
4 Correct 3 ms 5076 KB Output is correct
5 Correct 3 ms 5076 KB Output is correct
6 Correct 3 ms 5076 KB Output is correct
7 Correct 3 ms 5036 KB Output is correct
8 Correct 4 ms 5160 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5168 KB Output is correct
11 Correct 3 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5076 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 3 ms 5164 KB Output is correct
16 Correct 3 ms 5204 KB Output is correct
17 Correct 3 ms 5204 KB Output is correct
18 Correct 3 ms 5204 KB Output is correct
19 Correct 3 ms 5204 KB Output is correct
20 Correct 3 ms 5204 KB Output is correct
21 Correct 3 ms 5076 KB Output is correct
22 Correct 4 ms 5164 KB Output is correct
23 Correct 4 ms 5076 KB Output is correct
24 Correct 4 ms 5076 KB Output is correct
25 Correct 4 ms 5076 KB Output is correct
26 Correct 3 ms 5076 KB Output is correct
27 Correct 2 ms 5076 KB Output is correct
28 Correct 3 ms 5028 KB Output is correct
29 Correct 3 ms 5204 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 2 ms 5032 KB Output is correct
3 Correct 3 ms 5032 KB Output is correct
4 Correct 3 ms 5076 KB Output is correct
5 Correct 3 ms 5076 KB Output is correct
6 Correct 3 ms 5076 KB Output is correct
7 Correct 3 ms 5036 KB Output is correct
8 Correct 4 ms 5160 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5168 KB Output is correct
11 Correct 3 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5076 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 3 ms 5164 KB Output is correct
16 Correct 3 ms 5204 KB Output is correct
17 Correct 3 ms 5204 KB Output is correct
18 Correct 3 ms 5204 KB Output is correct
19 Correct 3 ms 5204 KB Output is correct
20 Correct 3 ms 5204 KB Output is correct
21 Correct 3 ms 5076 KB Output is correct
22 Correct 4 ms 5164 KB Output is correct
23 Correct 4 ms 5076 KB Output is correct
24 Correct 4 ms 5076 KB Output is correct
25 Correct 4 ms 5076 KB Output is correct
26 Correct 3 ms 5076 KB Output is correct
27 Correct 2 ms 5076 KB Output is correct
28 Correct 3 ms 5028 KB Output is correct
29 Correct 3 ms 5204 KB Output is correct
30 Correct 9 ms 5588 KB Output is correct
31 Correct 11 ms 5600 KB Output is correct
32 Correct 14 ms 5684 KB Output is correct
33 Correct 15 ms 5744 KB Output is correct
34 Correct 15 ms 5760 KB Output is correct
35 Correct 10 ms 5684 KB Output is correct
36 Correct 8 ms 5692 KB Output is correct
37 Correct 9 ms 5716 KB Output is correct
38 Correct 7 ms 5844 KB Output is correct
39 Correct 8 ms 5844 KB Output is correct
40 Correct 11 ms 5812 KB Output is correct
41 Correct 6 ms 5844 KB Output is correct
42 Correct 6 ms 5808 KB Output is correct
43 Correct 8 ms 5816 KB Output is correct
44 Correct 8 ms 5716 KB Output is correct
45 Correct 8 ms 5688 KB Output is correct
46 Correct 8 ms 5716 KB Output is correct
47 Correct 6 ms 5692 KB Output is correct
48 Correct 6 ms 5716 KB Output is correct
49 Correct 6 ms 5688 KB Output is correct
50 Correct 14 ms 5716 KB Output is correct
51 Correct 13 ms 5736 KB Output is correct
52 Correct 13 ms 5684 KB Output is correct
53 Correct 13 ms 5688 KB Output is correct
54 Correct 13 ms 5752 KB Output is correct
55 Correct 13 ms 5736 KB Output is correct
56 Correct 4 ms 5204 KB Output is correct
57 Correct 3 ms 5548 KB Output is correct
58 Correct 10 ms 5684 KB Output is correct

Subtask #3
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5076 KB Output is correct
2 Correct 3 ms 5032 KB Output is correct
3 Correct 3 ms 5176 KB Output is correct
4 Correct 2686 ms 30228 KB Output is correct
5 Correct 2127 ms 36416 KB Output is correct
6 Correct 2462 ms 40044 KB Output is correct
7 Correct 4907 ms 45832 KB Output is correct
8 Correct 4866 ms 45740 KB Output is correct
9 Correct 4769 ms 45752 KB Output is correct
10 Correct 4953 ms 45748 KB Output is correct
11 Execution timed out 5057 ms 45844 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 203 ms 20368 KB Output is correct
3 Correct 367 ms 22544 KB Output is correct
4 Correct 235 ms 24124 KB Output is correct
5 Correct 92 ms 31420 KB Output is correct
6 Correct 161 ms 32192 KB Output is correct
7 Correct 183 ms 32572 KB Output is correct
8 Correct 271 ms 32728 KB Output is correct
9 Correct 273 ms 32740 KB Output is correct
10 Correct 379 ms 32820 KB Output is correct
11 Correct 364 ms 32884 KB Output is correct
12 Correct 399 ms 32960 KB Output is correct
13 Correct 449 ms 33512 KB Output is correct
14 Correct 497 ms 34896 KB Output is correct
15 Correct 513 ms 40420 KB Output is correct
16 Correct 322 ms 33344 KB Output is correct
17 Correct 329 ms 33476 KB Output is correct
18 Correct 317 ms 33392 KB Output is correct
19 Correct 89 ms 32296 KB Output is correct
20 Correct 100 ms 32308 KB Output is correct
21 Correct 136 ms 32596 KB Output is correct
22 Correct 161 ms 32588 KB Output is correct
23 Correct 218 ms 32672 KB Output is correct
24 Correct 236 ms 32784 KB Output is correct
25 Correct 272 ms 32672 KB Output is correct
26 Correct 274 ms 32680 KB Output is correct
27 Correct 316 ms 32652 KB Output is correct
28 Correct 332 ms 32704 KB Output is correct
29 Correct 390 ms 32792 KB Output is correct
30 Correct 415 ms 32948 KB Output is correct
31 Correct 423 ms 33288 KB Output is correct
32 Correct 447 ms 34104 KB Output is correct
33 Correct 488 ms 35528 KB Output is correct
34 Correct 508 ms 39616 KB Output is correct

Subtask #5
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5028 KB Output is correct
2 Correct 2 ms 5076 KB Output is correct
3 Correct 3 ms 5204 KB Output is correct
4 Execution timed out 5086 ms 27184 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #6
0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 2 ms 5032 KB Output is correct
3 Correct 3 ms 5032 KB Output is correct
4 Correct 3 ms 5076 KB Output is correct
5 Correct 3 ms 5076 KB Output is correct
6 Correct 3 ms 5076 KB Output is correct
7 Correct 3 ms 5036 KB Output is correct
8 Correct 4 ms 5160 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5168 KB Output is correct
11 Correct 3 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5076 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 3 ms 5164 KB Output is correct
16 Correct 3 ms 5204 KB Output is correct
17 Correct 3 ms 5204 KB Output is correct
18 Correct 3 ms 5204 KB Output is correct
19 Correct 3 ms 5204 KB Output is correct
20 Correct 3 ms 5204 KB Output is correct
21 Correct 3 ms 5076 KB Output is correct
22 Correct 4 ms 5164 KB Output is correct
23 Correct 4 ms 5076 KB Output is correct
24 Correct 4 ms 5076 KB Output is correct
25 Correct 4 ms 5076 KB Output is correct
26 Correct 3 ms 5076 KB Output is correct
27 Correct 2 ms 5076 KB Output is correct
28 Correct 3 ms 5028 KB Output is correct
29 Correct 3 ms 5204 KB Output is correct
30 Correct 9 ms 5588 KB Output is correct
31 Correct 11 ms 5600 KB Output is correct
32 Correct 14 ms 5684 KB Output is correct
33 Correct 15 ms 5744 KB Output is correct
34 Correct 15 ms 5760 KB Output is correct
35 Correct 10 ms 5684 KB Output is correct
36 Correct 8 ms 5692 KB Output is correct
37 Correct 9 ms 5716 KB Output is correct
38 Correct 7 ms 5844 KB Output is correct
39 Correct 8 ms 5844 KB Output is correct
40 Correct 11 ms 5812 KB Output is correct
41 Correct 6 ms 5844 KB Output is correct
42 Correct 6 ms 5808 KB Output is correct
43 Correct 8 ms 5816 KB Output is correct
44 Correct 8 ms 5716 KB Output is correct
45 Correct 8 ms 5688 KB Output is correct
46 Correct 8 ms 5716 KB Output is correct
47 Correct 6 ms 5692 KB Output is correct
48 Correct 6 ms 5716 KB Output is correct
49 Correct 6 ms 5688 KB Output is correct
50 Correct 14 ms 5716 KB Output is correct
51 Correct 13 ms 5736 KB Output is correct
52 Correct 13 ms 5684 KB Output is correct
53 Correct 13 ms 5688 KB Output is correct
54 Correct 13 ms 5752 KB Output is correct
55 Correct 13 ms 5736 KB Output is correct
56 Correct 4 ms 5204 KB Output is correct
57 Correct 3 ms 5548 KB Output is correct
58 Correct 10 ms 5684 KB Output is correct
59 Correct 2 ms 5076 KB Output is correct
60 Correct 3 ms 5032 KB Output is correct
61 Correct 3 ms 5176 KB Output is correct
62 Correct 2686 ms 30228 KB Output is correct
63 Correct 2127 ms 36416 KB Output is correct
64 Correct 2462 ms 40044 KB Output is correct
65 Correct 4907 ms 45832 KB Output is correct
66 Correct 4866 ms 45740 KB Output is correct
67 Correct 4769 ms 45752 KB Output is correct
68 Correct 4953 ms 45748 KB Output is correct
69 Execution timed out 5057 ms 45844 KB Time limit exceeded
70 Halted 0 ms 0 KB -