oj.uz

답안 #756363

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
756363 2023-06-11T15:48:04 Z Desh03 Election Campaign (JOI15_election_campaign) C++17
100 / 100
 237 ms 30176 KB 
#include <bits/stdc++.h>
using namespace std;

vector<int> in, out, dep, dp, dp2;
vector<vector<int>> g, up;
vector<vector<tuple<int, int, int>>> qr;
int t, lg;

struct fenwick {
    vector<int> fenw;
    int n;
    void init(int n_) {
        fenw.resize(n = n_);
    }
    void upd(int u, int x) {
        for (; u < n; u |= u + 1) fenw[u] += x;
    }
    int qry(int u) {
        int s = 0;
        for (; u >= 0; u = (u & (u + 1)) - 1) s += fenw[u];
        return s;
    }
    int qry(int l, int r) {
        return qry(r) - qry(l - 1);
    }
} fen;

void dfs(int u) {
    in[u] = t++;
    for (int i = 1; i < lg; i++) up[i][u] = up[i - 1][up[i - 1][u]];
    for (int v : g[u])
        if (v ^ up[0][u])
            dep[v] = dep[u] + 1, up[0][v] = u, dfs(v);
    out[u] = t++;
}

void calc_dp(int u, int p) {
    for (int v : g[u])
        if (v ^ p) {
            calc_dp(v, u);
            dp2[u] += dp[v];
        }
    dp[u] = dp2[u];
    for (auto [x, y, w] : qr[u]) {
        int cost = dp2[u] - fen.qry(in[u], in[x]) - fen.qry(in[u], in[y]);
        dp[u] = max(dp[u], cost + w);
    }
    fen.upd(in[u], dp[u] - dp2[u]);
    fen.upd(out[u], dp2[u] - dp[u]);
}

int lca(int u, int v) {
    if (dep[u] < dep[v]) swap(u, v);
    int k = dep[u] - dep[v];
    for (int i = 0; i < lg; i++)
        if (k >> i & 1)
            u = up[i][u];
    if (u == v) return u;
    for (int i = lg - 1; i >= 0; i--)
        if (up[i][u] ^ up[i][v])
            u = up[i][u], v = up[i][v];
    return up[0][u];
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    while ((1 << lg) <= n) ++lg;
    g.resize(n), up = vector<vector<int>> (lg, vector<int> (n)), dp.resize(n), dp2.resize(n), dep.resize(n), qr.resize(n), in.resize(n), out.resize(n);
    for (int i = 0; i < n - 1; i++) {
        int u, v;
        cin >> u >> v;
        --u, --v;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    dfs(0);
    fen.init(t);
    int q;
    cin >> q;
    while (q--) {
        int u, v, w;
        cin >> u >> v >> w;
        --u, --v;
        qr[lca(u, v)].push_back({u, v, w});
    }
    calc_dp(0, 0);
    cout << dp[0] << '\n';
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 105 ms 18768 KB Output is correct
6 Correct 62 ms 26596 KB Output is correct
7 Correct 115 ms 23816 KB Output is correct
8 Correct 92 ms 19228 KB Output is correct
9 Correct 107 ms 22192 KB Output is correct
10 Correct 77 ms 19164 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 135 ms 29880 KB Output is correct
5 Correct 122 ms 29784 KB Output is correct
6 Correct 112 ms 29824 KB Output is correct
7 Correct 150 ms 29824 KB Output is correct
8 Correct 121 ms 29864 KB Output is correct
9 Correct 115 ms 29852 KB Output is correct
10 Correct 131 ms 29768 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 135 ms 29880 KB Output is correct
5 Correct 122 ms 29784 KB Output is correct
6 Correct 112 ms 29824 KB Output is correct
7 Correct 150 ms 29824 KB Output is correct
8 Correct 121 ms 29864 KB Output is correct
9 Correct 115 ms 29852 KB Output is correct
10 Correct 131 ms 29768 KB Output is correct
11 Correct 9 ms 1236 KB Output is correct
12 Correct 134 ms 30108 KB Output is correct
13 Correct 128 ms 30140 KB Output is correct
14 Correct 132 ms 30172 KB Output is correct
15 Correct 120 ms 30092 KB Output is correct
16 Correct 105 ms 30160 KB Output is correct
17 Correct 139 ms 30020 KB Output is correct
18 Correct 139 ms 30032 KB Output is correct
19 Correct 109 ms 30176 KB Output is correct
20 Correct 115 ms 30144 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 158 ms 21796 KB Output is correct
2 Correct 103 ms 29868 KB Output is correct
3 Correct 228 ms 26668 KB Output is correct
4 Correct 116 ms 22424 KB Output is correct
5 Correct 161 ms 26268 KB Output is correct
6 Correct 132 ms 22564 KB Output is correct
7 Correct 225 ms 25924 KB Output is correct
8 Correct 164 ms 21824 KB Output is correct
9 Correct 109 ms 29844 KB Output is correct
10 Correct 237 ms 25052 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 105 ms 18768 KB Output is correct
6 Correct 62 ms 26596 KB Output is correct
7 Correct 115 ms 23816 KB Output is correct
8 Correct 92 ms 19228 KB Output is correct
9 Correct 107 ms 22192 KB Output is correct
10 Correct 77 ms 19164 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 2 ms 468 KB Output is correct
13 Correct 2 ms 460 KB Output is correct
14 Correct 2 ms 444 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 2 ms 508 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 2 ms 468 KB Output is correct
19 Correct 1 ms 460 KB Output is correct
20 Correct 1 ms 456 KB Output is correct

Subtask #6
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 105 ms 18768 KB Output is correct
6 Correct 62 ms 26596 KB Output is correct
7 Correct 115 ms 23816 KB Output is correct
8 Correct 92 ms 19228 KB Output is correct
9 Correct 107 ms 22192 KB Output is correct
10 Correct 77 ms 19164 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 135 ms 29880 KB Output is correct
15 Correct 122 ms 29784 KB Output is correct
16 Correct 112 ms 29824 KB Output is correct
17 Correct 150 ms 29824 KB Output is correct
18 Correct 121 ms 29864 KB Output is correct
19 Correct 115 ms 29852 KB Output is correct
20 Correct 131 ms 29768 KB Output is correct
21 Correct 9 ms 1236 KB Output is correct
22 Correct 134 ms 30108 KB Output is correct
23 Correct 128 ms 30140 KB Output is correct
24 Correct 132 ms 30172 KB Output is correct
25 Correct 120 ms 30092 KB Output is correct
26 Correct 105 ms 30160 KB Output is correct
27 Correct 139 ms 30020 KB Output is correct
28 Correct 139 ms 30032 KB Output is correct
29 Correct 109 ms 30176 KB Output is correct
30 Correct 115 ms 30144 KB Output is correct
31 Correct 158 ms 21796 KB Output is correct
32 Correct 103 ms 29868 KB Output is correct
33 Correct 228 ms 26668 KB Output is correct
34 Correct 116 ms 22424 KB Output is correct
35 Correct 161 ms 26268 KB Output is correct
36 Correct 132 ms 22564 KB Output is correct
37 Correct 225 ms 25924 KB Output is correct
38 Correct 164 ms 21824 KB Output is correct
39 Correct 109 ms 29844 KB Output is correct
40 Correct 237 ms 25052 KB Output is correct
41 Correct 2 ms 468 KB Output is correct
42 Correct 2 ms 468 KB Output is correct
43 Correct 2 ms 460 KB Output is correct
44 Correct 2 ms 444 KB Output is correct
45 Correct 2 ms 468 KB Output is correct
46 Correct 2 ms 508 KB Output is correct
47 Correct 1 ms 468 KB Output is correct
48 Correct 2 ms 468 KB Output is correct
49 Correct 1 ms 460 KB Output is correct
50 Correct 1 ms 456 KB Output is correct
51 Correct 166 ms 22224 KB Output is correct
52 Correct 128 ms 30120 KB Output is correct
53 Correct 191 ms 25588 KB Output is correct
54 Correct 111 ms 22368 KB Output is correct
55 Correct 157 ms 22020 KB Output is correct
56 Correct 135 ms 30144 KB Output is correct
57 Correct 181 ms 26192 KB Output is correct
58 Correct 142 ms 22468 KB Output is correct
59 Correct 143 ms 22224 KB Output is correct
60 Correct 136 ms 30016 KB Output is correct
61 Correct 199 ms 26152 KB Output is correct
62 Correct 124 ms 23140 KB Output is correct
63 Correct 163 ms 22432 KB Output is correct
64 Correct 112 ms 30072 KB Output is correct
65 Correct 204 ms 26436 KB Output is correct
66 Correct 131 ms 22340 KB Output is correct
67 Correct 146 ms 22320 KB Output is correct
68 Correct 126 ms 30104 KB Output is correct
69 Correct 169 ms 24896 KB Output is correct
70 Correct 152 ms 22572 KB Output is correct