oj.uz

답안 #939682

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
939682 2024-03-06T16:36:23 Z alextodoran Tourism (JOI23_tourism) C++17
35 / 100
 5000 ms 39628 KB 
/**
 _  _   __  _ _ _  _  _ _
 |a  ||t  ||o    d | |o  |
| __    _| | _ | __|  _ |
| __ |/_  | __  /__\ / _\|

**/

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int N_MAX = 100000;
const int M_MAX = 100000;
const int Q_MAX = 100000;
const int LOG_N = 18;

int N, M, Q;
vector <int> adj[N_MAX + 2];
int C[M_MAX + 2];
int ql[Q_MAX + 2], qr[Q_MAX + 2];

int parent[N_MAX + 2];
int depth[N_MAX + 2];
int order[N_MAX + 2];
int L[N_MAX + 2], R[N_MAX + 2];
int curr;
int euler[N_MAX * 2 + 2];
int ecurr;

void dfs (int u) {
    euler[++ecurr] = u;
    L[u] = ++curr;
    order[curr] = u;
    for (int v : adj[u]) {
        if (v != parent[u]) {
            parent[v] = u;
            depth[v] = depth[u] + 1;
            dfs(v);
            euler[++ecurr] = u;
        }
    }
    R[u] = curr;
}

int p2[N_MAX * 2 + 2];

int range_lca[N_MAX * 2 + 2][LOG_N];
int arg_min_depth (const int &u, const int &v) {
    return (depth[u] < depth[v] ? u : v);
}

int euler_L[N_MAX + 2], euler_R[N_MAX + 2];
void precalc () {
    for (int i = 1; i <= N * 2; i++) {
        range_lca[i][0] = euler[i];
        if (euler_L[euler[i]] == 0) {
            euler_L[euler[i]] = i;
        }
        euler_R[euler[i]] = i;
    }
    for (int e = 1; e < LOG_N; e++) {
        for (int i = 1; i + (1 << e) - 1 <= N * 2; i++) {
            range_lca[i][e] = arg_min_depth(range_lca[i][e - 1],
                range_lca[i + (1 << (e - 1))][e - 1]);
        }
    }
}
int lca (int u, int v) {
    if (u == 0 || v == 0) {
        return 0;
    }
    if (L[u] > L[v]) {
        swap(u, v);
    }
    int l = euler_L[u], r = euler_R[v];
    int e = p2[r - l + 1];
    return arg_min_depth(range_lca[l][e], range_lca[r - (1 << e) + 1][e]);
}

int bucket;
int get_bucket (int i) {
    return (i - 1) / bucket + 1;
}
vector <int> queries[M_MAX + 2];

int cnt, root;

int Fen[N_MAX + 2];
void update (int pos, int sgn) {
    for (int i = pos; i <= N; i += i & -i) {
        Fen[i] += sgn;
    }
}
int query (int pos) {
    int cnt = 0;
    for (int i = pos; i >= 1; i -= i & -i) {
        cnt += Fen[i];
    }
    return cnt;
}
int get_kth (int k, int mx = N) {
    int i = 0;
    for (int e = p2[mx]; e >= 0 && k > 0; e--) {
        if (i + (1 << e) <= N && Fen[i + (1 << e)] < k) {
            i += (1 << e);
            k -= Fen[i];
        }
    }
    return i + 1;
}

int occ[N_MAX + 2];
int total = 0;
void add (int u) {
    if (++occ[u] == 1) {
        update(L[u], +1); total++;
        if (total == 1) {
            cnt = 1; root = u;
            return;
        }
        int upos = query(L[u]);
        int ur = (upos < total ? order[get_kth(upos + 1, N)] : 0);
        if (ur == 0 || R[u] < L[ur]) {
            int ul = (upos > 1 ? order[get_kth(upos - 1, L[u] - 1)] : 0);
            ul = lca(u, ul);
            ur = lca(u, ur);
            int v = (depth[ul] > depth[ur] ? ul : ur);
            cnt += depth[u] - depth[v];
            if (depth[v] < depth[root]) {
                cnt += depth[root] - depth[v];
                root = v;
            }
        } else {
            int v = lca(u, root);
            cnt += depth[root] - depth[v];
            root = v;
        }
    }
}
void del (int u) {
    if (--occ[u] == 0) {
        update(L[u], -1); total--;
    }
}

int answer[Q_MAX + 2];

int main () {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
//    mt19937 rnd(0);

    cin >> N >> M >> Q;
//    N = M = Q = 100000;
    for (int i = 1; i <= N - 1; i++) {
        int u, v;
        cin >> u >> v;
//        u = rnd() % i + 1;
//        v = i + 1;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    for (int i = 1; i <= M; i++) {
        cin >> C[i];
//        C[i] = i;
    }
//    shuffle(C + 1, C + M + 1, rnd);
    for (int i = 1; i <= Q; i++) {
        cin >> ql[i] >> qr[i];
//        ql[i] = rnd() % M + 1;
//        qr[i] = rnd() % M + 1;
//        if (ql[i] > qr[i]) {
//            swap(ql[i], qr[i]);
//        }
    }
    for (int i = 1; i <= N * 2; i++) {
        p2[i] = p2[i - 1];
        if ((1 << (p2[i] + 1)) <= i) {
            p2[i]++;
        }
    }
    depth[1] = 1;
    dfs(1);
    precalc();
    bucket = max(1, min(M, (int) sqrt(M)));
    for (int i = 1; i <= Q; i++) {
        int bl = get_bucket(ql[i]), br = get_bucket(qr[i]);
        if (bl < br) {
            queries[bl].push_back(i);
        } else {
            for (int j = ql[i]; j <= qr[i]; j++) {
                add(C[j]);
            }
            answer[i] = cnt;
            for (int j = qr[i]; j >= ql[i]; j--) {
                del(C[j]);
            }
            cnt = root = 0;
        }
    }
    for (int b = 1; b <= get_bucket(M) - 1; b++) {
        sort(queries[b].begin(), queries[b].end(), [&] (const int &i, const int &j) {
            return qr[i] < qr[j];
        });
        int r = b * bucket;
        for (int i : queries[b]) {
            while (r < qr[i]) {
                add(C[++r]);
            }
            int prv_cnt = cnt, prv_root = root;
            for (int j = b * bucket; j >= ql[i]; j--) {
                add(C[j]);
            }
            answer[i] = cnt;
            for (int j = ql[i]; j <= b * bucket; j++) {
                del(C[j]);
            }
            cnt = prv_cnt; root = prv_root;
        }
        while (r > b * bucket) {
            occ[C[r--]]--;
        }
        cnt = root = 0;
        fill(Fen + 1, Fen + N + 1, 0); total = 0;
    }
    for (int i = 1; i <= Q; i++) {
        cout << answer[i] << "\n";
    }

    return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 11352 KB Output is correct
2 Correct 2 ms 11356 KB Output is correct
3 Correct 2 ms 11356 KB Output is correct
4 Correct 2 ms 11356 KB Output is correct
5 Correct 3 ms 11356 KB Output is correct
6 Correct 2 ms 11356 KB Output is correct
7 Correct 3 ms 11356 KB Output is correct
8 Correct 2 ms 11356 KB Output is correct
9 Correct 2 ms 11356 KB Output is correct
10 Correct 3 ms 11376 KB Output is correct
11 Correct 3 ms 11356 KB Output is correct
12 Correct 2 ms 11352 KB Output is correct
13 Correct 2 ms 11412 KB Output is correct
14 Correct 3 ms 11356 KB Output is correct
15 Correct 2 ms 11356 KB Output is correct
16 Correct 3 ms 11352 KB Output is correct
17 Correct 3 ms 11608 KB Output is correct
18 Correct 2 ms 11356 KB Output is correct
19 Correct 3 ms 11356 KB Output is correct
20 Correct 3 ms 11356 KB Output is correct
21 Correct 3 ms 11356 KB Output is correct
22 Correct 3 ms 11356 KB Output is correct
23 Correct 3 ms 11356 KB Output is correct
24 Correct 4 ms 11428 KB Output is correct
25 Correct 3 ms 11360 KB Output is correct
26 Correct 3 ms 11356 KB Output is correct
27 Correct 3 ms 11352 KB Output is correct
28 Correct 2 ms 11356 KB Output is correct
29 Correct 2 ms 11368 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 11352 KB Output is correct
2 Correct 2 ms 11356 KB Output is correct
3 Correct 2 ms 11356 KB Output is correct
4 Correct 2 ms 11356 KB Output is correct
5 Correct 3 ms 11356 KB Output is correct
6 Correct 2 ms 11356 KB Output is correct
7 Correct 3 ms 11356 KB Output is correct
8 Correct 2 ms 11356 KB Output is correct
9 Correct 2 ms 11356 KB Output is correct
10 Correct 3 ms 11376 KB Output is correct
11 Correct 3 ms 11356 KB Output is correct
12 Correct 2 ms 11352 KB Output is correct
13 Correct 2 ms 11412 KB Output is correct
14 Correct 3 ms 11356 KB Output is correct
15 Correct 2 ms 11356 KB Output is correct
16 Correct 3 ms 11352 KB Output is correct
17 Correct 3 ms 11608 KB Output is correct
18 Correct 2 ms 11356 KB Output is correct
19 Correct 3 ms 11356 KB Output is correct
20 Correct 3 ms 11356 KB Output is correct
21 Correct 3 ms 11356 KB Output is correct
22 Correct 3 ms 11356 KB Output is correct
23 Correct 3 ms 11356 KB Output is correct
24 Correct 4 ms 11428 KB Output is correct
25 Correct 3 ms 11360 KB Output is correct
26 Correct 3 ms 11356 KB Output is correct
27 Correct 3 ms 11352 KB Output is correct
28 Correct 2 ms 11356 KB Output is correct
29 Correct 2 ms 11368 KB Output is correct
30 Correct 11 ms 11352 KB Output is correct
31 Correct 9 ms 11352 KB Output is correct
32 Correct 11 ms 11356 KB Output is correct
33 Correct 15 ms 11356 KB Output is correct
34 Correct 11 ms 11352 KB Output is correct
35 Correct 4 ms 11356 KB Output is correct
36 Correct 4 ms 11576 KB Output is correct
37 Correct 6 ms 11356 KB Output is correct
38 Correct 9 ms 11612 KB Output is correct
39 Correct 8 ms 11612 KB Output is correct
40 Correct 11 ms 11620 KB Output is correct
41 Correct 5 ms 11612 KB Output is correct
42 Correct 5 ms 11452 KB Output is correct
43 Correct 4 ms 11612 KB Output is correct
44 Correct 9 ms 11612 KB Output is correct
45 Correct 9 ms 11452 KB Output is correct
46 Correct 9 ms 11624 KB Output is correct
47 Correct 4 ms 11356 KB Output is correct
48 Correct 4 ms 11356 KB Output is correct
49 Correct 4 ms 11612 KB Output is correct
50 Correct 13 ms 11564 KB Output is correct
51 Correct 12 ms 11356 KB Output is correct
52 Correct 11 ms 11356 KB Output is correct
53 Correct 11 ms 11572 KB Output is correct
54 Correct 12 ms 11356 KB Output is correct
55 Correct 11 ms 11356 KB Output is correct
56 Correct 3 ms 11356 KB Output is correct
57 Correct 3 ms 11356 KB Output is correct
58 Correct 4 ms 11356 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 11356 KB Output is correct
2 Correct 2 ms 11356 KB Output is correct
3 Correct 3 ms 11272 KB Output is correct
4 Correct 2305 ms 27416 KB Output is correct
5 Correct 1784 ms 33644 KB Output is correct
6 Correct 2567 ms 35572 KB Output is correct
7 Correct 4089 ms 38272 KB Output is correct
8 Correct 4065 ms 39628 KB Output is correct
9 Correct 4188 ms 39368 KB Output is correct
10 Correct 4117 ms 39376 KB Output is correct
11 Correct 4074 ms 39368 KB Output is correct
12 Correct 785 ms 39040 KB Output is correct
13 Correct 736 ms 39028 KB Output is correct
14 Correct 786 ms 39112 KB Output is correct
15 Correct 50 ms 36944 KB Output is correct
16 Correct 65 ms 38276 KB Output is correct
17 Correct 178 ms 13640 KB Output is correct

Subtask #4
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 11352 KB Output is correct
2 Correct 40 ms 22352 KB Output is correct
3 Correct 55 ms 24656 KB Output is correct
4 Correct 54 ms 24924 KB Output is correct
5 Correct 86 ms 30032 KB Output is correct
6 Correct 76 ms 30032 KB Output is correct
7 Correct 92 ms 30160 KB Output is correct
8 Correct 92 ms 30156 KB Output is correct
9 Correct 98 ms 30032 KB Output is correct
10 Correct 97 ms 30548 KB Output is correct
11 Correct 86 ms 30172 KB Output is correct
12 Correct 102 ms 30032 KB Output is correct
13 Correct 97 ms 30224 KB Output is correct
14 Correct 78 ms 30592 KB Output is correct
15 Correct 70 ms 31056 KB Output is correct
16 Correct 89 ms 30296 KB Output is correct
17 Correct 77 ms 30320 KB Output is correct
18 Correct 93 ms 30576 KB Output is correct
19 Correct 78 ms 30036 KB Output is correct
20 Correct 62 ms 30032 KB Output is correct
21 Correct 64 ms 30036 KB Output is correct
22 Correct 69 ms 30080 KB Output is correct
23 Correct 83 ms 30424 KB Output is correct
24 Correct 94 ms 30128 KB Output is correct
25 Correct 85 ms 30148 KB Output is correct
26 Correct 83 ms 29976 KB Output is correct
27 Correct 81 ms 30004 KB Output is correct
28 Correct 83 ms 29944 KB Output is correct
29 Correct 82 ms 30032 KB Output is correct
30 Correct 78 ms 30240 KB Output is correct
31 Correct 78 ms 30280 KB Output is correct
32 Correct 89 ms 30804 KB Output is correct
33 Correct 79 ms 30936 KB Output is correct
34 Correct 74 ms 31192 KB Output is correct

Subtask #5
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 11352 KB Output is correct
2 Correct 2 ms 11356 KB Output is correct
3 Correct 3 ms 11356 KB Output is correct
4 Correct 4089 ms 24664 KB Output is correct
5 Correct 4745 ms 26520 KB Output is correct
6 Execution timed out 5044 ms 29272 KB Time limit exceeded
7 Halted 0 ms 0 KB -

Subtask #6
0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 11352 KB Output is correct
2 Correct 2 ms 11356 KB Output is correct
3 Correct 2 ms 11356 KB Output is correct
4 Correct 2 ms 11356 KB Output is correct
5 Correct 3 ms 11356 KB Output is correct
6 Correct 2 ms 11356 KB Output is correct
7 Correct 3 ms 11356 KB Output is correct
8 Correct 2 ms 11356 KB Output is correct
9 Correct 2 ms 11356 KB Output is correct
10 Correct 3 ms 11376 KB Output is correct
11 Correct 3 ms 11356 KB Output is correct
12 Correct 2 ms 11352 KB Output is correct
13 Correct 2 ms 11412 KB Output is correct
14 Correct 3 ms 11356 KB Output is correct
15 Correct 2 ms 11356 KB Output is correct
16 Correct 3 ms 11352 KB Output is correct
17 Correct 3 ms 11608 KB Output is correct
18 Correct 2 ms 11356 KB Output is correct
19 Correct 3 ms 11356 KB Output is correct
20 Correct 3 ms 11356 KB Output is correct
21 Correct 3 ms 11356 KB Output is correct
22 Correct 3 ms 11356 KB Output is correct
23 Correct 3 ms 11356 KB Output is correct
24 Correct 4 ms 11428 KB Output is correct
25 Correct 3 ms 11360 KB Output is correct
26 Correct 3 ms 11356 KB Output is correct
27 Correct 3 ms 11352 KB Output is correct
28 Correct 2 ms 11356 KB Output is correct
29 Correct 2 ms 11368 KB Output is correct
30 Correct 11 ms 11352 KB Output is correct
31 Correct 9 ms 11352 KB Output is correct
32 Correct 11 ms 11356 KB Output is correct
33 Correct 15 ms 11356 KB Output is correct
34 Correct 11 ms 11352 KB Output is correct
35 Correct 4 ms 11356 KB Output is correct
36 Correct 4 ms 11576 KB Output is correct
37 Correct 6 ms 11356 KB Output is correct
38 Correct 9 ms 11612 KB Output is correct
39 Correct 8 ms 11612 KB Output is correct
40 Correct 11 ms 11620 KB Output is correct
41 Correct 5 ms 11612 KB Output is correct
42 Correct 5 ms 11452 KB Output is correct
43 Correct 4 ms 11612 KB Output is correct
44 Correct 9 ms 11612 KB Output is correct
45 Correct 9 ms 11452 KB Output is correct
46 Correct 9 ms 11624 KB Output is correct
47 Correct 4 ms 11356 KB Output is correct
48 Correct 4 ms 11356 KB Output is correct
49 Correct 4 ms 11612 KB Output is correct
50 Correct 13 ms 11564 KB Output is correct
51 Correct 12 ms 11356 KB Output is correct
52 Correct 11 ms 11356 KB Output is correct
53 Correct 11 ms 11572 KB Output is correct
54 Correct 12 ms 11356 KB Output is correct
55 Correct 11 ms 11356 KB Output is correct
56 Correct 3 ms 11356 KB Output is correct
57 Correct 3 ms 11356 KB Output is correct
58 Correct 4 ms 11356 KB Output is correct
59 Correct 2 ms 11356 KB Output is correct
60 Correct 2 ms 11356 KB Output is correct
61 Correct 3 ms 11272 KB Output is correct
62 Correct 2305 ms 27416 KB Output is correct
63 Correct 1784 ms 33644 KB Output is correct
64 Correct 2567 ms 35572 KB Output is correct
65 Correct 4089 ms 38272 KB Output is correct
66 Correct 4065 ms 39628 KB Output is correct
67 Correct 4188 ms 39368 KB Output is correct
68 Correct 4117 ms 39376 KB Output is correct
69 Correct 4074 ms 39368 KB Output is correct
70 Correct 785 ms 39040 KB Output is correct
71 Correct 736 ms 39028 KB Output is correct
72 Correct 786 ms 39112 KB Output is correct
73 Correct 50 ms 36944 KB Output is correct
74 Correct 65 ms 38276 KB Output is correct
75 Correct 178 ms 13640 KB Output is correct
76 Correct 3 ms 11352 KB Output is correct
77 Correct 40 ms 22352 KB Output is correct
78 Correct 55 ms 24656 KB Output is correct
79 Correct 54 ms 24924 KB Output is correct
80 Correct 86 ms 30032 KB Output is correct
81 Correct 76 ms 30032 KB Output is correct
82 Correct 92 ms 30160 KB Output is correct
83 Correct 92 ms 30156 KB Output is correct
84 Correct 98 ms 30032 KB Output is correct
85 Correct 97 ms 30548 KB Output is correct
86 Correct 86 ms 30172 KB Output is correct
87 Correct 102 ms 30032 KB Output is correct
88 Correct 97 ms 30224 KB Output is correct
89 Correct 78 ms 30592 KB Output is correct
90 Correct 70 ms 31056 KB Output is correct
91 Correct 89 ms 30296 KB Output is correct
92 Correct 77 ms 30320 KB Output is correct
93 Correct 93 ms 30576 KB Output is correct
94 Correct 78 ms 30036 KB Output is correct
95 Correct 62 ms 30032 KB Output is correct
96 Correct 64 ms 30036 KB Output is correct
97 Correct 69 ms 30080 KB Output is correct
98 Correct 83 ms 30424 KB Output is correct
99 Correct 94 ms 30128 KB Output is correct
100 Correct 85 ms 30148 KB Output is correct
101 Correct 83 ms 29976 KB Output is correct
102 Correct 81 ms 30004 KB Output is correct
103 Correct 83 ms 29944 KB Output is correct
104 Correct 82 ms 30032 KB Output is correct
105 Correct 78 ms 30240 KB Output is correct
106 Correct 78 ms 30280 KB Output is correct
107 Correct 89 ms 30804 KB Output is correct
108 Correct 79 ms 30936 KB Output is correct
109 Correct 74 ms 31192 KB Output is correct
110 Correct 2 ms 11352 KB Output is correct
111 Correct 2 ms 11356 KB Output is correct
112 Correct 3 ms 11356 KB Output is correct
113 Correct 4089 ms 24664 KB Output is correct
114 Correct 4745 ms 26520 KB Output is correct
115 Execution timed out 5044 ms 29272 KB Time limit exceeded
116 Halted 0 ms 0 KB -