oj.uz

답안 #550753

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
550753 2022-04-19T02:48:40 Z thuanqvbn03 Election Campaign (JOI15_election_campaign) C++17
100 / 100
 312 ms 37072 KB 
// Flower_On_Stone
#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 100005;
const int LOG = 17;

struct SegmentTree
{
private:
    int treeSize;
    vector<int> nodes;
    void initTree(int id, int low, int high)
    {
        if (low == high)
        {
            nodes[id] = 0;
            return;
        }
        int mid = (low + high) / 2;
        initTree(id * 2, low, mid);
        initTree(id * 2 + 1, mid + 1, high);
    }
    void update(int id, int low, int high, int left, int right, int val)
    {
        if (low > right || high < left)
        {
            return;
        }
        if (low >= left && high <= right)
        {
            nodes[id] += val;
            return;
        }
        int mid = (low + high) / 2;
        update(id * 2, low, mid, left, right, val);
        update(id * 2 + 1, mid + 1, high, left, right, val);
    }
    int get(int id, int low, int high, int pos)
    {
        if (low > pos || high < pos)
        {
            return 0;
        }
        if (low == high)
        {
            return nodes[id];
        }
        int mid = (low + high) / 2;
        return nodes[id] + (pos <= mid ? get(id * 2, low, mid, pos) : get(id * 2 + 1, mid + 1, high, pos));
    }

public:
    void init(int treeSize)
    {
        this->treeSize = treeSize;
        int tmp = 1;
        while (tmp < treeSize)
        {
            tmp *= 2;
        }
        nodes.resize(tmp * 2);
        initTree(1, 1, treeSize);
    }
    void update(int left, int right, int val)
    {
        update(1, 1, treeSize, left, right, val);
    }
    int get(int pos)
    {
        return get(1, 1, treeSize, pos);
    }
} smt;

struct Plan
{
    int u, v, cost;
} plans[MAX_N];
int numCity, numPLan;
vector<int> adj[MAX_N], planAt[MAX_N];
int start[MAX_N], stop[MAX_N], depth[MAX_N];
int parent[MAX_N][LOG];
int id;
int f[MAX_N], sumF[MAX_N];

void dfs(int node)
{
    for (int level = 0; level < LOG - 1; level++)
    {
        parent[node][level + 1] = parent[parent[node][level]][level];
    }
    start[node] = ++id;
    for (auto &u : adj[node])
    {
        if (u != parent[node][0])
        {
            depth[u] = depth[node] + 1;
            parent[u][0] = node;
            dfs(u);
        }
    }
    stop[node] = id;
}

int lca(int u, int v)
{
    if (depth[u] >depth[v])
    {
        swap(u, v);
    }
    for (int level = LOG - 1; level >= 0; level--)
    {
        if (depth[parent[v][level]] >= depth[u])
        {
            v = parent[v][level];
        }
    }
    if (u == v){
        return u;
    }
    for (int level = LOG - 1; level >= 0; level--)
    {
        if (parent[u][level] != parent[v][level])
        {
            u = parent[u][level];
            v = parent[v][level];
        }
    }
    return parent[u][0];
}

int jump(int node, int high)
{
    for (int level = LOG - 1; level >= 0; level--)
    {
        if (depth[parent[node][level]] >= high)
        {
            node = parent[node][level];
        }
    }
    return node;
}

void dp(int node)
{
    sumF[node] = 0;
    for (auto &u : adj[node])
    {
        if (u != parent[node][0])
        {
            dp(u);
            sumF[node] += f[u];
        }
    }
    f[node] = sumF[node];
    for (auto &index : planAt[node])
    {
        int u = plans[index].u, v = plans[index].v;
        int pu = jump(u, depth[node] + 1), pv = jump(v, depth[node] + 1);
        int tmp = sumF[node];
        if (u != node){
            tmp += smt.get(start[u]) - f[pu];
        }
        if (v != node)
        {
            tmp += smt.get(start[v]) - f[pv];
        }
        f[node] = max(f[node], tmp + plans[index].cost);
    }
    for (auto &u : adj[node])
    {
        if (u != parent[node][0])
        {
            smt.update(start[u], stop[u], sumF[node] - f[u]);
        }
    }
    smt.update(start[node], start[node], sumF[node]);
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
#ifdef Flower_On_Stone
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif // Flower_On_Stone
    cin >> numCity;
    for (int i = 1; i < numCity; i++)
    {
        int u, v;
        cin >> u >> v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    cin >> numPLan;
    for (int i = 1; i <= numPLan; i++)
    {
        cin >> plans[i].u >> plans[i].v >> plans[i].cost;
    }
    depth[0] = -1;
    id = 0;
    dfs(1);
    smt.init(numCity);
    for (int i = 1; i <= numPLan; i++)
    {
        planAt[lca(plans[i].u, plans[i].v)].push_back(i);
    }
    dp(1);
    cout << f[1];
    return 0;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 4 ms 5164 KB Output is correct
5 Correct 115 ms 18988 KB Output is correct
6 Correct 65 ms 32932 KB Output is correct
7 Correct 123 ms 28060 KB Output is correct
8 Correct 79 ms 19372 KB Output is correct
9 Correct 110 ms 25244 KB Output is correct
10 Correct 94 ms 19428 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 4 ms 4948 KB Output is correct
3 Correct 4 ms 5296 KB Output is correct
4 Correct 156 ms 36496 KB Output is correct
5 Correct 152 ms 36480 KB Output is correct
6 Correct 164 ms 36620 KB Output is correct
7 Correct 155 ms 36580 KB Output is correct
8 Correct 148 ms 36524 KB Output is correct
9 Correct 151 ms 36560 KB Output is correct
10 Correct 187 ms 36564 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 4 ms 4948 KB Output is correct
3 Correct 4 ms 5296 KB Output is correct
4 Correct 156 ms 36496 KB Output is correct
5 Correct 152 ms 36480 KB Output is correct
6 Correct 164 ms 36620 KB Output is correct
7 Correct 155 ms 36580 KB Output is correct
8 Correct 148 ms 36524 KB Output is correct
9 Correct 151 ms 36560 KB Output is correct
10 Correct 187 ms 36564 KB Output is correct
11 Correct 15 ms 6092 KB Output is correct
12 Correct 161 ms 36776 KB Output is correct
13 Correct 162 ms 36772 KB Output is correct
14 Correct 161 ms 36940 KB Output is correct
15 Correct 161 ms 36832 KB Output is correct
16 Correct 143 ms 36888 KB Output is correct
17 Correct 167 ms 36808 KB Output is correct
18 Correct 177 ms 37072 KB Output is correct
19 Correct 141 ms 36884 KB Output is correct
20 Correct 149 ms 36816 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 213 ms 22024 KB Output is correct
2 Correct 140 ms 36580 KB Output is correct
3 Correct 267 ms 31104 KB Output is correct
4 Correct 176 ms 22356 KB Output is correct
5 Correct 229 ms 30252 KB Output is correct
6 Correct 161 ms 22512 KB Output is correct
7 Correct 291 ms 29952 KB Output is correct
8 Correct 189 ms 22444 KB Output is correct
9 Correct 145 ms 36588 KB Output is correct
10 Correct 312 ms 28340 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 4 ms 5164 KB Output is correct
5 Correct 115 ms 18988 KB Output is correct
6 Correct 65 ms 32932 KB Output is correct
7 Correct 123 ms 28060 KB Output is correct
8 Correct 79 ms 19372 KB Output is correct
9 Correct 110 ms 25244 KB Output is correct
10 Correct 94 ms 19428 KB Output is correct
11 Correct 4 ms 5204 KB Output is correct
12 Correct 4 ms 5332 KB Output is correct
13 Correct 5 ms 5296 KB Output is correct
14 Correct 4 ms 5176 KB Output is correct
15 Correct 4 ms 5204 KB Output is correct
16 Correct 4 ms 5172 KB Output is correct
17 Correct 5 ms 5168 KB Output is correct
18 Correct 5 ms 5340 KB Output is correct
19 Correct 4 ms 5204 KB Output is correct
20 Correct 4 ms 5332 KB Output is correct

Subtask #6
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 4 ms 5164 KB Output is correct
5 Correct 115 ms 18988 KB Output is correct
6 Correct 65 ms 32932 KB Output is correct
7 Correct 123 ms 28060 KB Output is correct
8 Correct 79 ms 19372 KB Output is correct
9 Correct 110 ms 25244 KB Output is correct
10 Correct 94 ms 19428 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 4 ms 5296 KB Output is correct
14 Correct 156 ms 36496 KB Output is correct
15 Correct 152 ms 36480 KB Output is correct
16 Correct 164 ms 36620 KB Output is correct
17 Correct 155 ms 36580 KB Output is correct
18 Correct 148 ms 36524 KB Output is correct
19 Correct 151 ms 36560 KB Output is correct
20 Correct 187 ms 36564 KB Output is correct
21 Correct 15 ms 6092 KB Output is correct
22 Correct 161 ms 36776 KB Output is correct
23 Correct 162 ms 36772 KB Output is correct
24 Correct 161 ms 36940 KB Output is correct
25 Correct 161 ms 36832 KB Output is correct
26 Correct 143 ms 36888 KB Output is correct
27 Correct 167 ms 36808 KB Output is correct
28 Correct 177 ms 37072 KB Output is correct
29 Correct 141 ms 36884 KB Output is correct
30 Correct 149 ms 36816 KB Output is correct
31 Correct 213 ms 22024 KB Output is correct
32 Correct 140 ms 36580 KB Output is correct
33 Correct 267 ms 31104 KB Output is correct
34 Correct 176 ms 22356 KB Output is correct
35 Correct 229 ms 30252 KB Output is correct
36 Correct 161 ms 22512 KB Output is correct
37 Correct 291 ms 29952 KB Output is correct
38 Correct 189 ms 22444 KB Output is correct
39 Correct 145 ms 36588 KB Output is correct
40 Correct 312 ms 28340 KB Output is correct
41 Correct 4 ms 5204 KB Output is correct
42 Correct 4 ms 5332 KB Output is correct
43 Correct 5 ms 5296 KB Output is correct
44 Correct 4 ms 5176 KB Output is correct
45 Correct 4 ms 5204 KB Output is correct
46 Correct 4 ms 5172 KB Output is correct
47 Correct 5 ms 5168 KB Output is correct
48 Correct 5 ms 5340 KB Output is correct
49 Correct 4 ms 5204 KB Output is correct
50 Correct 4 ms 5332 KB Output is correct
51 Correct 210 ms 22888 KB Output is correct
52 Correct 177 ms 36820 KB Output is correct
53 Correct 269 ms 28748 KB Output is correct
54 Correct 164 ms 22852 KB Output is correct
55 Correct 216 ms 22344 KB Output is correct
56 Correct 148 ms 36776 KB Output is correct
57 Correct 237 ms 29772 KB Output is correct
58 Correct 174 ms 22776 KB Output is correct
59 Correct 198 ms 22800 KB Output is correct
60 Correct 161 ms 36824 KB Output is correct
61 Correct 268 ms 29948 KB Output is correct
62 Correct 171 ms 22612 KB Output is correct
63 Correct 216 ms 22368 KB Output is correct
64 Correct 171 ms 36796 KB Output is correct
65 Correct 278 ms 29800 KB Output is correct
66 Correct 177 ms 22736 KB Output is correct
67 Correct 196 ms 22492 KB Output is correct
68 Correct 151 ms 36820 KB Output is correct
69 Correct 245 ms 27852 KB Output is correct
70 Correct 161 ms 22804 KB Output is correct