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답안 #939764

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
939764 2024-03-06T17:45:29 Z alextodoran Tourism (JOI23_tourism) C++17
35 / 100
 5000 ms 39448 KB 
/**
 _  _   __  _ _ _  _  _ _
 |a  ||t  ||o    d | |o  |
| __    _| | _ | __|  _ |
| __ |/_  | __  /__\ / _\|

**/

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int BUFFER_SIZE = 65536;

char buffer[BUFFER_SIZE];
int buf_pos = BUFFER_SIZE - 1;

char read_char () {
    if (++buf_pos == BUFFER_SIZE) {
        fread(buffer, BUFFER_SIZE, sizeof(char), stdin);
        buf_pos = 0;
    }
    return buffer[buf_pos];
}
int read_int () {
    char c;
    while (!isdigit(c = read_char()));
    int val = 0;
    do {
        val = val * 10 + (int) (c - '0');
    } while (isdigit(c = read_char()));
    return val;
}

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; bool b;
    for (int e = p2[mx]; e >= 0 && k > 0; e--) {
        b = (i + (1 << e) <= mx && Fen[i + (1 << e)] < k);
        i += b * (1 << e);
        k -= b * 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 if (depth[u] < depth[root]) {
            cnt += depth[root] - depth[u];
            root = u;
        }
    }
}
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);

    N = read_int();
    M = read_int();
    Q = read_int();
//    N = M = Q = 100000;
    for (int i = 1; i <= N - 1; i++) {
        int u, v;
        u = read_int();
        v = read_int();
//        u = rnd() % i + 1;
//        v = i + 1;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    for (int i = 1; i <= M; i++) {
        C[i] = read_int();
//        C[i] = i;
    }
//    shuffle(C + 1, C + M + 1, rnd);
    for (int i = 1; i <= Q; i++) {
        ql[i] = read_int();
        qr[i] = read_int();
//        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;
}

Compilation message

tourism.cpp: In function 'char read_char()':
tourism.cpp:22:14: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         fread(buffer, BUFFER_SIZE, sizeof(char), stdin);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 11352 KB Output is correct
2 Correct 3 ms 11356 KB Output is correct
3 Correct 2 ms 11356 KB Output is correct
4 Correct 2 ms 11360 KB Output is correct
5 Correct 3 ms 11364 KB Output is correct
6 Correct 2 ms 11356 KB Output is correct
7 Correct 2 ms 11352 KB Output is correct
8 Correct 3 ms 11356 KB Output is correct
9 Correct 4 ms 11356 KB Output is correct
10 Correct 3 ms 11356 KB Output is correct
11 Correct 2 ms 11356 KB Output is correct
12 Correct 2 ms 11356 KB Output is correct
13 Correct 2 ms 11356 KB Output is correct
14 Correct 2 ms 11356 KB Output is correct
15 Correct 2 ms 11352 KB Output is correct
16 Correct 2 ms 11356 KB Output is correct
17 Correct 2 ms 11356 KB Output is correct
18 Correct 2 ms 11356 KB Output is correct
19 Correct 2 ms 11356 KB Output is correct
20 Correct 2 ms 11352 KB Output is correct
21 Correct 3 ms 11356 KB Output is correct
22 Correct 2 ms 11356 KB Output is correct
23 Correct 3 ms 11356 KB Output is correct
24 Correct 2 ms 11356 KB Output is correct
25 Correct 3 ms 11344 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 11352 KB Output is correct
29 Correct 3 ms 11356 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 3 ms 11356 KB Output is correct
3 Correct 2 ms 11356 KB Output is correct
4 Correct 2 ms 11360 KB Output is correct
5 Correct 3 ms 11364 KB Output is correct
6 Correct 2 ms 11356 KB Output is correct
7 Correct 2 ms 11352 KB Output is correct
8 Correct 3 ms 11356 KB Output is correct
9 Correct 4 ms 11356 KB Output is correct
10 Correct 3 ms 11356 KB Output is correct
11 Correct 2 ms 11356 KB Output is correct
12 Correct 2 ms 11356 KB Output is correct
13 Correct 2 ms 11356 KB Output is correct
14 Correct 2 ms 11356 KB Output is correct
15 Correct 2 ms 11352 KB Output is correct
16 Correct 2 ms 11356 KB Output is correct
17 Correct 2 ms 11356 KB Output is correct
18 Correct 2 ms 11356 KB Output is correct
19 Correct 2 ms 11356 KB Output is correct
20 Correct 2 ms 11352 KB Output is correct
21 Correct 3 ms 11356 KB Output is correct
22 Correct 2 ms 11356 KB Output is correct
23 Correct 3 ms 11356 KB Output is correct
24 Correct 2 ms 11356 KB Output is correct
25 Correct 3 ms 11344 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 11352 KB Output is correct
29 Correct 3 ms 11356 KB Output is correct
30 Correct 8 ms 11388 KB Output is correct
31 Correct 8 ms 11356 KB Output is correct
32 Correct 12 ms 11612 KB Output is correct
33 Correct 11 ms 11620 KB Output is correct
34 Correct 10 ms 11612 KB Output is correct
35 Correct 5 ms 11408 KB Output is correct
36 Correct 5 ms 11612 KB Output is correct
37 Correct 5 ms 11604 KB Output is correct
38 Correct 7 ms 11692 KB Output is correct
39 Correct 7 ms 11612 KB Output is correct
40 Correct 7 ms 11612 KB Output is correct
41 Correct 4 ms 11612 KB Output is correct
42 Correct 4 ms 11612 KB Output is correct
43 Correct 4 ms 11612 KB Output is correct
44 Correct 8 ms 11612 KB Output is correct
45 Correct 7 ms 11612 KB Output is correct
46 Correct 7 ms 11660 KB Output is correct
47 Correct 4 ms 11404 KB Output is correct
48 Correct 4 ms 11612 KB Output is correct
49 Correct 4 ms 11612 KB Output is correct
50 Correct 10 ms 11608 KB Output is correct
51 Correct 11 ms 11612 KB Output is correct
52 Correct 12 ms 11616 KB Output is correct
53 Correct 12 ms 11612 KB Output is correct
54 Correct 10 ms 11516 KB Output is correct
55 Correct 10 ms 11612 KB Output is correct
56 Correct 3 ms 11404 KB Output is correct
57 Correct 2 ms 11356 KB Output is correct
58 Correct 3 ms 11356 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 11356 KB Output is correct
2 Correct 2 ms 11356 KB Output is correct
3 Correct 3 ms 11328 KB Output is correct
4 Correct 1724 ms 25996 KB Output is correct
5 Correct 1372 ms 34424 KB Output is correct
6 Correct 1810 ms 36504 KB Output is correct
7 Correct 2867 ms 39428 KB Output is correct
8 Correct 2833 ms 39436 KB Output is correct
9 Correct 2805 ms 39440 KB Output is correct
10 Correct 2807 ms 39448 KB Output is correct
11 Correct 2833 ms 39428 KB Output is correct
12 Correct 1060 ms 39004 KB Output is correct
13 Correct 1090 ms 39088 KB Output is correct
14 Correct 1282 ms 39000 KB Output is correct
15 Correct 48 ms 36944 KB Output is correct
16 Correct 49 ms 38228 KB Output is correct
17 Correct 161 ms 13656 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 29 ms 21656 KB Output is correct
3 Correct 51 ms 24916 KB Output is correct
4 Correct 51 ms 25168 KB Output is correct
5 Correct 73 ms 30892 KB Output is correct
6 Correct 65 ms 30684 KB Output is correct
7 Correct 75 ms 30740 KB Output is correct
8 Correct 70 ms 30736 KB Output is correct
9 Correct 78 ms 30492 KB Output is correct
10 Correct 84 ms 30752 KB Output is correct
11 Correct 89 ms 30756 KB Output is correct
12 Correct 79 ms 30804 KB Output is correct
13 Correct 71 ms 30888 KB Output is correct
14 Correct 76 ms 31176 KB Output is correct
15 Correct 57 ms 32144 KB Output is correct
16 Correct 83 ms 30928 KB Output is correct
17 Correct 67 ms 30836 KB Output is correct
18 Correct 63 ms 30856 KB Output is correct
19 Correct 47 ms 30760 KB Output is correct
20 Correct 49 ms 30556 KB Output is correct
21 Correct 58 ms 30732 KB Output is correct
22 Correct 62 ms 30748 KB Output is correct
23 Correct 56 ms 30724 KB Output is correct
24 Correct 64 ms 30740 KB Output is correct
25 Correct 75 ms 30720 KB Output is correct
26 Correct 64 ms 30564 KB Output is correct
27 Correct 72 ms 30764 KB Output is correct
28 Correct 81 ms 30988 KB Output is correct
29 Correct 75 ms 30740 KB Output is correct
30 Correct 82 ms 30760 KB Output is correct
31 Correct 71 ms 30876 KB Output is correct
32 Correct 58 ms 30992 KB Output is correct
33 Correct 73 ms 31476 KB Output is correct
34 Correct 51 ms 32316 KB Output is correct

Subtask #5
0 / 24.0

# 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 11356 KB Output is correct
4 Correct 3738 ms 22992 KB Output is correct
5 Correct 3898 ms 27248 KB Output is correct
6 Execution timed out 5044 ms 29944 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 3 ms 11356 KB Output is correct
3 Correct 2 ms 11356 KB Output is correct
4 Correct 2 ms 11360 KB Output is correct
5 Correct 3 ms 11364 KB Output is correct
6 Correct 2 ms 11356 KB Output is correct
7 Correct 2 ms 11352 KB Output is correct
8 Correct 3 ms 11356 KB Output is correct
9 Correct 4 ms 11356 KB Output is correct
10 Correct 3 ms 11356 KB Output is correct
11 Correct 2 ms 11356 KB Output is correct
12 Correct 2 ms 11356 KB Output is correct
13 Correct 2 ms 11356 KB Output is correct
14 Correct 2 ms 11356 KB Output is correct
15 Correct 2 ms 11352 KB Output is correct
16 Correct 2 ms 11356 KB Output is correct
17 Correct 2 ms 11356 KB Output is correct
18 Correct 2 ms 11356 KB Output is correct
19 Correct 2 ms 11356 KB Output is correct
20 Correct 2 ms 11352 KB Output is correct
21 Correct 3 ms 11356 KB Output is correct
22 Correct 2 ms 11356 KB Output is correct
23 Correct 3 ms 11356 KB Output is correct
24 Correct 2 ms 11356 KB Output is correct
25 Correct 3 ms 11344 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 11352 KB Output is correct
29 Correct 3 ms 11356 KB Output is correct
30 Correct 8 ms 11388 KB Output is correct
31 Correct 8 ms 11356 KB Output is correct
32 Correct 12 ms 11612 KB Output is correct
33 Correct 11 ms 11620 KB Output is correct
34 Correct 10 ms 11612 KB Output is correct
35 Correct 5 ms 11408 KB Output is correct
36 Correct 5 ms 11612 KB Output is correct
37 Correct 5 ms 11604 KB Output is correct
38 Correct 7 ms 11692 KB Output is correct
39 Correct 7 ms 11612 KB Output is correct
40 Correct 7 ms 11612 KB Output is correct
41 Correct 4 ms 11612 KB Output is correct
42 Correct 4 ms 11612 KB Output is correct
43 Correct 4 ms 11612 KB Output is correct
44 Correct 8 ms 11612 KB Output is correct
45 Correct 7 ms 11612 KB Output is correct
46 Correct 7 ms 11660 KB Output is correct
47 Correct 4 ms 11404 KB Output is correct
48 Correct 4 ms 11612 KB Output is correct
49 Correct 4 ms 11612 KB Output is correct
50 Correct 10 ms 11608 KB Output is correct
51 Correct 11 ms 11612 KB Output is correct
52 Correct 12 ms 11616 KB Output is correct
53 Correct 12 ms 11612 KB Output is correct
54 Correct 10 ms 11516 KB Output is correct
55 Correct 10 ms 11612 KB Output is correct
56 Correct 3 ms 11404 KB Output is correct
57 Correct 2 ms 11356 KB Output is correct
58 Correct 3 ms 11356 KB Output is correct
59 Correct 3 ms 11356 KB Output is correct
60 Correct 2 ms 11356 KB Output is correct
61 Correct 3 ms 11328 KB Output is correct
62 Correct 1724 ms 25996 KB Output is correct
63 Correct 1372 ms 34424 KB Output is correct
64 Correct 1810 ms 36504 KB Output is correct
65 Correct 2867 ms 39428 KB Output is correct
66 Correct 2833 ms 39436 KB Output is correct
67 Correct 2805 ms 39440 KB Output is correct
68 Correct 2807 ms 39448 KB Output is correct
69 Correct 2833 ms 39428 KB Output is correct
70 Correct 1060 ms 39004 KB Output is correct
71 Correct 1090 ms 39088 KB Output is correct
72 Correct 1282 ms 39000 KB Output is correct
73 Correct 48 ms 36944 KB Output is correct
74 Correct 49 ms 38228 KB Output is correct
75 Correct 161 ms 13656 KB Output is correct
76 Correct 3 ms 11352 KB Output is correct
77 Correct 29 ms 21656 KB Output is correct
78 Correct 51 ms 24916 KB Output is correct
79 Correct 51 ms 25168 KB Output is correct
80 Correct 73 ms 30892 KB Output is correct
81 Correct 65 ms 30684 KB Output is correct
82 Correct 75 ms 30740 KB Output is correct
83 Correct 70 ms 30736 KB Output is correct
84 Correct 78 ms 30492 KB Output is correct
85 Correct 84 ms 30752 KB Output is correct
86 Correct 89 ms 30756 KB Output is correct
87 Correct 79 ms 30804 KB Output is correct
88 Correct 71 ms 30888 KB Output is correct
89 Correct 76 ms 31176 KB Output is correct
90 Correct 57 ms 32144 KB Output is correct
91 Correct 83 ms 30928 KB Output is correct
92 Correct 67 ms 30836 KB Output is correct
93 Correct 63 ms 30856 KB Output is correct
94 Correct 47 ms 30760 KB Output is correct
95 Correct 49 ms 30556 KB Output is correct
96 Correct 58 ms 30732 KB Output is correct
97 Correct 62 ms 30748 KB Output is correct
98 Correct 56 ms 30724 KB Output is correct
99 Correct 64 ms 30740 KB Output is correct
100 Correct 75 ms 30720 KB Output is correct
101 Correct 64 ms 30564 KB Output is correct
102 Correct 72 ms 30764 KB Output is correct
103 Correct 81 ms 30988 KB Output is correct
104 Correct 75 ms 30740 KB Output is correct
105 Correct 82 ms 30760 KB Output is correct
106 Correct 71 ms 30876 KB Output is correct
107 Correct 58 ms 30992 KB Output is correct
108 Correct 73 ms 31476 KB Output is correct
109 Correct 51 ms 32316 KB Output is correct
110 Correct 2 ms 11356 KB Output is correct
111 Correct 2 ms 11356 KB Output is correct
112 Correct 3 ms 11356 KB Output is correct
113 Correct 3738 ms 22992 KB Output is correct
114 Correct 3898 ms 27248 KB Output is correct
115 Execution timed out 5044 ms 29944 KB Time limit exceeded
116 Halted 0 ms 0 KB -