oj.uz

Submission #889559

# Submission time Handle Problem Language Result Execution time Memory
889559 2023-12-20T02:23:38 Z _callmelucian Tourism (JOI23_tourism) C++14
35 / 100
 184 ms 33108 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef tuple<int,int,int> tt;
#define all(a) a.begin(), a.end()

const int mn = 1e5 + 10;
int up[mn][17], sight[mn];
vector<int> adj[mn];
pii qry[mn];
int n, m, q;
bool stickTree = 1;

/* subtask */
namespace sub_2 {

int sz[mn], mark[mn];

int szDfs (int u, int p) {
    sz[u] = mark[u];
    for (int v : adj[u])
        if (v != p) sz[u] += szDfs(v, u);
    return sz[u];
}

int dfs (int u, int p, bool toParent = 0) {
    int child = 0, ans = 0;
    for (int v : adj[u])
        if (v != p && sz[v]) child++;
    toParent |= (child > 1 || mark[u]);

    for (int v : adj[u]) {
        if (v == p || !sz[v]) continue;
        ans += dfs(v, u, toParent);
    }
    return ans + toParent;
}

void solve() {
    for (int j = 0; j < q; j++) {
        for (int i = 1; i <= n; i++) mark[i] = 0;
        for (int i = qry[j].first; i <= qry[j].second; i++) mark[sight[i]] = 1;
        szDfs(1, 1);
        cout << dfs(1, 1) << "\n";
    }
}

bool check() {
    return n <= 2000 && m <= 2000 && q <= 2000;
}

}
/* end of subtask */

/* subtask */
namespace sub_3 {

int max_spt[mn][17], min_spt[mn][17];

int query (int l, int r) {
    int p = 31 - __builtin_clz(r - l + 1);
    int lo = min(min_spt[l][p], min_spt[r - (1 << p) + 1][p]);
    int hi = max(max_spt[l][p], max_spt[r - (1 << p) + 1][p]);
    return hi - lo + 1;
}

void solve() {
    for (int i = 1; i <= m; i++) max_spt[i][0] = min_spt[i][0] = sight[i];
    for (int s = 1; (1 << s) <= m; s++) {
        for (int i = 1; i + (1 << s) - 1 <= m; i++) {
            int p = s - 1;
            max_spt[i][s] = max(max_spt[i][p], max_spt[i + (1 << p)][p]);
            min_spt[i][s] = min(min_spt[i][p], min_spt[i + (1 << p)][p]);
        }
    }
    for (int i = 0; i < q; i++) {
        int l, r; tie(l, r) = qry[i];
        cout << query(l, r) << "\n";
    }
}

bool check() {
    return stickTree;
}

}
/* end of subtask */

/* subtask */
namespace sub_4 {

int spt[mn][21], up[mn][21], depth[mn], num[mn], sz[mn];
int timeDfs;

int dfs (int u, int p, int d) {
    up[u][0] = p, depth[u] = d, num[u] = ++timeDfs, sz[u] = 1;
    for (int i = 1; i < 21; i++) up[u][i] = up[up[u][i - 1]][i - 1];
    for (int v : adj[u])
        if (v != p) sz[u] += dfs(v, u, d + 1);
    return sz[u];
}

int goUp (int a, int k) {
    int LOG = 31 - __builtin_clz(k);
    for (int i = 0; i <= LOG; i++)
        if (k & (1 << i)) a = up[a][i];
    return a;
}

int lca (int a, int b) {
    a = goUp(a, max(0, depth[a] - depth[b]));
    b = goUp(b, max(0, depth[b] - depth[a]));
    if (a == b) return a;

    for (int i = 20; i >= 0; i--)
        if (up[a][i] != up[b][i]) a = up[a][i], b = up[b][i];
    return up[a][0];
}

int dist (int a, int b) {
    return depth[a] + depth[b] - 2 * depth[lca(a, b)];
}

struct BIT {
    vector<int> tr;
    BIT (int sz) : tr(4 * sz) {}

    int p (int k) { return k & -k; }

    void update (int k, int val) {
        for (; k < tr.size(); k += p(k)) tr[k] += val;
    }

    int sum (int k, int ans = 0) {
        for (; k; k -= p(k)) ans += tr[k];
        return ans;
    }

    int query (int l, int r) { return sum(r) - sum(l - 1); }
};

bool inTree (int subtr, int node) {
    return num[subtr] <= num[node] && num[node] < num[subtr] + sz[subtr];
}

int query (int l, int r) {
    int p = 31 - __builtin_clz(r - l + 1);
    return lca(spt[l][p], spt[r - (1 << p) + 1][p]);
}

void solve() {
    dfs(1, 1, 1);
    for (int i = 1; i <= m; i++) spt[i][0] = sight[i];
    for (int s = 1; (1 << s) <= m; s++) {
        for (int i = 1; i + (1 << s) - 1 <= m; i++) {
            int p = s - 1;
            spt[i][s] = lca(spt[i][p], spt[i + (1 << p)][p]);
        }
    }

    BIT tree(n);
    for (int i = 0; i < q; i++) {
        int ans = 0, l = qry[i].first;
        for (int r = qry[i].first; r <= qry[i].second; r++) {
            if (l == r) ans = 1;
            else if (inTree(query(l, r - 1), sight[r])) {
                int node = sight[r];
                if (!tree.query(num[node], num[node] + sz[node] - 1)) {
                    for (int j = 20; j >= 0; j--) {
                        int p = up[node][j];
                        if (!tree.query(num[p], num[p] + sz[p] - 1)) node = p;
                    }
                    ans += depth[sight[r]] - depth[node] + 1;
                }
            }
            else ans += dist(query(l, r - 1), sight[r]);

            tree.update(num[sight[r]], 1);
        }
        for (int r = qry[i].first; r <= qry[i].second; r++) tree.update(num[sight[r]], -1);
        cout << ans << "\n";
    }
}

bool check() {
    if (qry[0].first != 1 || qry[q - 1].second != m) return 0;
    for (int i = 0; i < q - 1; i++)
        if (qry[i].second + 1 != qry[i + 1].first) return 0;
    return 1;
}

}
/* end of subtask */

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);

    cin >> n >> m >> q;
    for (int i = 1; i < n; i++) {
        int a, b; cin >> a >> b;
        stickTree &= (a == i && b == i + 1);
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    for (int i = 1; i <= m; i++) cin >> sight[i];
    for (int i = 0; i < q; i++) {
        int l, r; cin >> l >> r;
        qry[i] = {l, r};
    }

    if (sub_2::check()) return sub_2::solve(), 0;
    if (sub_3::check()) return sub_3::solve(), 0;
    if (sub_4::check()) return sub_4::solve(), 0;

    return 0;
}

Compilation message

tourism.cpp: In member function 'void sub_4::BIT::update(int, int)':
tourism.cpp:134:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  134 |         for (; k < tr.size(); k += p(k)) tr[k] += val;
      |                ~~^~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6616 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6616 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6488 KB Output is correct
9 Correct 2 ms 6636 KB Output is correct
10 Correct 3 ms 6632 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 2 ms 6492 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 3 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6488 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6492 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 2 ms 6580 KB Output is correct
25 Correct 2 ms 6492 KB Output is correct
26 Correct 2 ms 6640 KB Output is correct
27 Correct 1 ms 6624 KB Output is correct
28 Correct 2 ms 6488 KB Output is correct
29 Correct 2 ms 6488 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6616 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6616 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6488 KB Output is correct
9 Correct 2 ms 6636 KB Output is correct
10 Correct 3 ms 6632 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 2 ms 6492 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 3 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6488 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6492 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 2 ms 6580 KB Output is correct
25 Correct 2 ms 6492 KB Output is correct
26 Correct 2 ms 6640 KB Output is correct
27 Correct 1 ms 6624 KB Output is correct
28 Correct 2 ms 6488 KB Output is correct
29 Correct 2 ms 6488 KB Output is correct
30 Correct 37 ms 6492 KB Output is correct
31 Correct 44 ms 6688 KB Output is correct
32 Correct 74 ms 6728 KB Output is correct
33 Correct 74 ms 6492 KB Output is correct
34 Correct 79 ms 6968 KB Output is correct
35 Correct 73 ms 6712 KB Output is correct
36 Correct 76 ms 6492 KB Output is correct
37 Correct 78 ms 6720 KB Output is correct
38 Correct 74 ms 6804 KB Output is correct
39 Correct 79 ms 6796 KB Output is correct
40 Correct 71 ms 6748 KB Output is correct
41 Correct 75 ms 6744 KB Output is correct
42 Correct 75 ms 6836 KB Output is correct
43 Correct 73 ms 6748 KB Output is correct
44 Correct 76 ms 7008 KB Output is correct
45 Correct 72 ms 6744 KB Output is correct
46 Correct 74 ms 6748 KB Output is correct
47 Correct 79 ms 6748 KB Output is correct
48 Correct 75 ms 6752 KB Output is correct
49 Correct 76 ms 6992 KB Output is correct
50 Correct 39 ms 6748 KB Output is correct
51 Correct 41 ms 6492 KB Output is correct
52 Correct 40 ms 6492 KB Output is correct
53 Correct 40 ms 6488 KB Output is correct
54 Correct 41 ms 6492 KB Output is correct
55 Correct 44 ms 6736 KB Output is correct
56 Correct 2 ms 6492 KB Output is correct
57 Correct 34 ms 6716 KB Output is correct
58 Correct 27 ms 6492 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6580 KB Output is correct
3 Correct 2 ms 6488 KB Output is correct
4 Correct 35 ms 24304 KB Output is correct
5 Correct 34 ms 21084 KB Output is correct
6 Correct 39 ms 25364 KB Output is correct
7 Correct 49 ms 26452 KB Output is correct
8 Correct 48 ms 26452 KB Output is correct
9 Correct 65 ms 26456 KB Output is correct
10 Correct 49 ms 26448 KB Output is correct
11 Correct 52 ms 26452 KB Output is correct
12 Correct 46 ms 26196 KB Output is correct
13 Correct 46 ms 26196 KB Output is correct
14 Correct 46 ms 26192 KB Output is correct
15 Correct 32 ms 12884 KB Output is correct
16 Correct 71 ms 26112 KB Output is correct
17 Correct 29 ms 22048 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 58 ms 20448 KB Output is correct
3 Correct 90 ms 27220 KB Output is correct
4 Correct 80 ms 27560 KB Output is correct
5 Correct 104 ms 31776 KB Output is correct
6 Correct 109 ms 31568 KB Output is correct
7 Correct 125 ms 31572 KB Output is correct
8 Correct 120 ms 31568 KB Output is correct
9 Correct 119 ms 31568 KB Output is correct
10 Correct 128 ms 31756 KB Output is correct
11 Correct 122 ms 31568 KB Output is correct
12 Correct 129 ms 31824 KB Output is correct
13 Correct 135 ms 31828 KB Output is correct
14 Correct 107 ms 32120 KB Output is correct
15 Correct 92 ms 33092 KB Output is correct
16 Correct 126 ms 31920 KB Output is correct
17 Correct 108 ms 31828 KB Output is correct
18 Correct 107 ms 31928 KB Output is correct
19 Correct 109 ms 31736 KB Output is correct
20 Correct 97 ms 31776 KB Output is correct
21 Correct 101 ms 31568 KB Output is correct
22 Correct 111 ms 31584 KB Output is correct
23 Correct 115 ms 31820 KB Output is correct
24 Correct 129 ms 31584 KB Output is correct
25 Correct 140 ms 31568 KB Output is correct
26 Correct 144 ms 31800 KB Output is correct
27 Correct 143 ms 31828 KB Output is correct
28 Correct 150 ms 31572 KB Output is correct
29 Correct 160 ms 31824 KB Output is correct
30 Correct 184 ms 31824 KB Output is correct
31 Correct 157 ms 32080 KB Output is correct
32 Correct 134 ms 32080 KB Output is correct
33 Correct 116 ms 32340 KB Output is correct
34 Correct 110 ms 33108 KB Output is correct

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6744 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 2 ms 6572 KB Output is correct
4 Incorrect 28 ms 9636 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6616 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6616 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6488 KB Output is correct
9 Correct 2 ms 6636 KB Output is correct
10 Correct 3 ms 6632 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 2 ms 6492 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 3 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6488 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6492 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 2 ms 6580 KB Output is correct
25 Correct 2 ms 6492 KB Output is correct
26 Correct 2 ms 6640 KB Output is correct
27 Correct 1 ms 6624 KB Output is correct
28 Correct 2 ms 6488 KB Output is correct
29 Correct 2 ms 6488 KB Output is correct
30 Correct 37 ms 6492 KB Output is correct
31 Correct 44 ms 6688 KB Output is correct
32 Correct 74 ms 6728 KB Output is correct
33 Correct 74 ms 6492 KB Output is correct
34 Correct 79 ms 6968 KB Output is correct
35 Correct 73 ms 6712 KB Output is correct
36 Correct 76 ms 6492 KB Output is correct
37 Correct 78 ms 6720 KB Output is correct
38 Correct 74 ms 6804 KB Output is correct
39 Correct 79 ms 6796 KB Output is correct
40 Correct 71 ms 6748 KB Output is correct
41 Correct 75 ms 6744 KB Output is correct
42 Correct 75 ms 6836 KB Output is correct
43 Correct 73 ms 6748 KB Output is correct
44 Correct 76 ms 7008 KB Output is correct
45 Correct 72 ms 6744 KB Output is correct
46 Correct 74 ms 6748 KB Output is correct
47 Correct 79 ms 6748 KB Output is correct
48 Correct 75 ms 6752 KB Output is correct
49 Correct 76 ms 6992 KB Output is correct
50 Correct 39 ms 6748 KB Output is correct
51 Correct 41 ms 6492 KB Output is correct
52 Correct 40 ms 6492 KB Output is correct
53 Correct 40 ms 6488 KB Output is correct
54 Correct 41 ms 6492 KB Output is correct
55 Correct 44 ms 6736 KB Output is correct
56 Correct 2 ms 6492 KB Output is correct
57 Correct 34 ms 6716 KB Output is correct
58 Correct 27 ms 6492 KB Output is correct
59 Correct 1 ms 6492 KB Output is correct
60 Correct 1 ms 6580 KB Output is correct
61 Correct 2 ms 6488 KB Output is correct
62 Correct 35 ms 24304 KB Output is correct
63 Correct 34 ms 21084 KB Output is correct
64 Correct 39 ms 25364 KB Output is correct
65 Correct 49 ms 26452 KB Output is correct
66 Correct 48 ms 26452 KB Output is correct
67 Correct 65 ms 26456 KB Output is correct
68 Correct 49 ms 26448 KB Output is correct
69 Correct 52 ms 26452 KB Output is correct
70 Correct 46 ms 26196 KB Output is correct
71 Correct 46 ms 26196 KB Output is correct
72 Correct 46 ms 26192 KB Output is correct
73 Correct 32 ms 12884 KB Output is correct
74 Correct 71 ms 26112 KB Output is correct
75 Correct 29 ms 22048 KB Output is correct
76 Correct 1 ms 6492 KB Output is correct
77 Correct 58 ms 20448 KB Output is correct
78 Correct 90 ms 27220 KB Output is correct
79 Correct 80 ms 27560 KB Output is correct
80 Correct 104 ms 31776 KB Output is correct
81 Correct 109 ms 31568 KB Output is correct
82 Correct 125 ms 31572 KB Output is correct
83 Correct 120 ms 31568 KB Output is correct
84 Correct 119 ms 31568 KB Output is correct
85 Correct 128 ms 31756 KB Output is correct
86 Correct 122 ms 31568 KB Output is correct
87 Correct 129 ms 31824 KB Output is correct
88 Correct 135 ms 31828 KB Output is correct
89 Correct 107 ms 32120 KB Output is correct
90 Correct 92 ms 33092 KB Output is correct
91 Correct 126 ms 31920 KB Output is correct
92 Correct 108 ms 31828 KB Output is correct
93 Correct 107 ms 31928 KB Output is correct
94 Correct 109 ms 31736 KB Output is correct
95 Correct 97 ms 31776 KB Output is correct
96 Correct 101 ms 31568 KB Output is correct
97 Correct 111 ms 31584 KB Output is correct
98 Correct 115 ms 31820 KB Output is correct
99 Correct 129 ms 31584 KB Output is correct
100 Correct 140 ms 31568 KB Output is correct
101 Correct 144 ms 31800 KB Output is correct
102 Correct 143 ms 31828 KB Output is correct
103 Correct 150 ms 31572 KB Output is correct
104 Correct 160 ms 31824 KB Output is correct
105 Correct 184 ms 31824 KB Output is correct
106 Correct 157 ms 32080 KB Output is correct
107 Correct 134 ms 32080 KB Output is correct
108 Correct 116 ms 32340 KB Output is correct
109 Correct 110 ms 33108 KB Output is correct
110 Correct 1 ms 6744 KB Output is correct
111 Correct 1 ms 6492 KB Output is correct
112 Correct 2 ms 6572 KB Output is correct
113 Incorrect 28 ms 9636 KB Output isn't correct
114 Halted 0 ms 0 KB -