oj.uz

답안 #746797

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
746797 2023-05-23T06:14:45 Z GrindMachine Election Campaign (JOI15_election_campaign) C++17
20 / 100
 1000 ms 43424 KB 
// Om Namah Shivaya

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x, y) ((x + y - 1) / (y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep1(i, n) for(int i = 1; i <= n; ++i)
#define rev(i, s, e) for(int i = s; i >= e; --i)
#define trav(i, a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a, b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a, b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

vector<ll> adj[N];

struct lca_algo {
    // LCA template (for graphs with 1-based indexing)

    int LOG = 1;
    vector<int> depth;
    vector<vector<int>> up;

    lca_algo() {

    }

    lca_algo(int n) {
        lca_init(n);
    }

    void lca_init(int n) {
        while ((1 << LOG) < n) LOG++;
        up = vector<vector<int>>(n + 1, vector<int>(LOG, 1));
        depth = vector<int>(n + 1);

        lca_dfs(1, -1);
    }

    void lca_dfs(int node, int par) {
        trav(child, adj[node]) {
            if (child == par) conts;

            up[child][0] = node;
            rep1(j, LOG - 1) {
                up[child][j] = up[up[child][j - 1]][j - 1];
            }

            depth[child] = depth[node] + 1;

            lca_dfs(child, node);
        }
    }

    int lift(int u, int k) {
        rep(j, LOG) {
            if (k & (1 << j)) {
                u = up[u][j];
            }
        }

        return u;
    }

    int query(int u, int v) {
        if (depth[u] < depth[v]) swap(u, v);
        int k = depth[u] - depth[v];
        u = lift(u, k);

        if (u == v) return u;

        rev(j, LOG - 1, 0) {
            if (up[u][j] != up[v][j]) {
                u = up[u][j];
                v = up[v][j];
            }
        }

        u = up[u][0];
        return u;
    }

    int get_dis(int u, int v) {
        int lca = query(u, v);
        return depth[u] + depth[v] - 2 * depth[lca];
    }
};

vector<array<ll,3>> here[N];
vector<ll> dp(N);
vector<ll> tin(N), tout(N);
vector<ll> par(N,-1);
ll timer = 1;
ll n;

void dfs1(ll u, ll p){
    tin[u] = timer++;
    trav(v, adj[u]){
        if(v == p) conts;
        par[v] = u;
        dfs1(v, u);
    }
    tout[u] = timer++;
}

void dfs2(ll u, ll p){
    trav(v, adj[u]){
        if(v == p) conts;
        dfs2(v, u);
    }

    // pick 1 path passing through u
    for(auto [x, y, w] : here[u]){
        ll val = w;

        rep1(i,n){
            if(i == u) conts;
            if(tin[u] <= tin[i] and tout[u] >= tout[i]){
                if(tin[i] <= tin[x] and tout[i] >= tout[x]) conts;
                if(tin[i] <= tin[y] and tout[i] >= tout[y]) conts;

                ll pa = par[i];
                if((tin[pa] <= tin[x] and tout[pa] >= tout[x]) or (tin[pa] <= tin[y] and tout[pa] >= tout[y])){
                    val += dp[i];
                }
            }
        }

        amax(dp[u], val);
    }

    // dont pick any path going through u
    ll sum = 0;

    trav(v,adj[u]){
        if(v == p) conts;
        sum += dp[v];
    }

    amax(dp[u], sum);
}

void solve(int test_case)
{
    cin >> n;
    rep1(i,n-1){
        ll u,v; cin >> u >> v;
        adj[u].pb(v), adj[v].pb(u);
    }

    lca_algo LCA(n);

    ll m; cin >> m;

    rep1(i,m){
        ll u,v,w; cin >> u >> v >> w;
        ll lca = LCA.query(u,v);
        here[lca].pb({u, v, w});
    }

    dfs1(1, -1);
    dfs2(1, -1);

    ll ans = dp[1];
    cout << ans << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 8148 KB Output is correct
2 Correct 5 ms 8148 KB Output is correct
3 Correct 4 ms 8148 KB Output is correct
4 Correct 4 ms 8276 KB Output is correct
5 Correct 111 ms 23696 KB Output is correct
6 Correct 64 ms 38544 KB Output is correct
7 Correct 119 ms 33616 KB Output is correct
8 Correct 82 ms 23840 KB Output is correct
9 Correct 112 ms 30496 KB Output is correct
10 Correct 82 ms 23852 KB Output is correct

Subtask #2
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 8148 KB Output is correct
2 Correct 6 ms 8148 KB Output is correct
3 Correct 5 ms 8404 KB Output is correct
4 Execution timed out 1080 ms 43424 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #3
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 8148 KB Output is correct
2 Correct 6 ms 8148 KB Output is correct
3 Correct 5 ms 8404 KB Output is correct
4 Execution timed out 1080 ms 43424 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1057 ms 27924 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 8148 KB Output is correct
2 Correct 5 ms 8148 KB Output is correct
3 Correct 4 ms 8148 KB Output is correct
4 Correct 4 ms 8276 KB Output is correct
5 Correct 111 ms 23696 KB Output is correct
6 Correct 64 ms 38544 KB Output is correct
7 Correct 119 ms 33616 KB Output is correct
8 Correct 82 ms 23840 KB Output is correct
9 Correct 112 ms 30496 KB Output is correct
10 Correct 82 ms 23852 KB Output is correct
11 Correct 12 ms 8396 KB Output is correct
12 Correct 7 ms 8404 KB Output is correct
13 Correct 10 ms 8404 KB Output is correct
14 Correct 14 ms 8276 KB Output is correct
15 Correct 12 ms 8276 KB Output is correct
16 Correct 10 ms 8276 KB Output is correct
17 Correct 14 ms 8316 KB Output is correct
18 Correct 12 ms 8304 KB Output is correct
19 Correct 11 ms 8376 KB Output is correct
20 Correct 7 ms 8432 KB Output is correct

Subtask #6
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 8148 KB Output is correct
2 Correct 5 ms 8148 KB Output is correct
3 Correct 4 ms 8148 KB Output is correct
4 Correct 4 ms 8276 KB Output is correct
5 Correct 111 ms 23696 KB Output is correct
6 Correct 64 ms 38544 KB Output is correct
7 Correct 119 ms 33616 KB Output is correct
8 Correct 82 ms 23840 KB Output is correct
9 Correct 112 ms 30496 KB Output is correct
10 Correct 82 ms 23852 KB Output is correct
11 Correct 5 ms 8148 KB Output is correct
12 Correct 6 ms 8148 KB Output is correct
13 Correct 5 ms 8404 KB Output is correct
14 Execution timed out 1080 ms 43424 KB Time limit exceeded
15 Halted 0 ms 0 KB -