oj.uz

Submission #843520

# Submission time Handle Problem Language Result Execution time Memory
843520 2023-09-04T04:16:41 Z daoquanglinh2007 Factories (JOI14_factories) C++17
15 / 100
 8000 ms 241284 KB 
#include "factories.h"
#include <bits/stdc++.h>
#define taskname ""
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define ll long long
#define ld long double
#define pb push_back
#define ff first
#define ss second
#define pii pair<int, int>
#define vi vector<int>
#define vll vector<ll>
#define vvi vector<vi>
#define vii vector<pii>
#define isz(x) (int)x.size()
using namespace std;

const int mxN = 1e6 + 5;
const ll oo = 1e18;

int n;
vector<vii> G;

vi vtn;
vector<vii> vt;

ll dis[mxN];
pii sparse[25][mxN];
int timer, ecnt, ap[mxN], dep[mxN], cur[mxN], tin[mxN], tout[mxN];

void dfs(int v, int p) {
    tin[v] = ++timer;
    dep[v] = dep[p] + 1;
    sparse[0][++ecnt] = {dep[v], v};
    ap[v] = ecnt;

    for(auto &[u, w] : G[v]) {
        if(u == p) continue;
        dis[u] = dis[v] + w;
        dfs(u, v);
        sparse[0][++ecnt] = {dep[v], v};
    }

    tout[v] = ++timer;
}

void build_sparse() {
    assert(ecnt <= 2*n);
    for(int p = 1, i = 1; p << 1 <= ecnt; p <<= 1, ++i)
        for(int j = 1; j <= ecnt - (p << 1) + 1; ++j)
            sparse[i][j] = min(sparse[i - 1][j], sparse[i - 1][j + p]);
}

bool is_ancestor(int u, int v) {
    return tin[u] <= tin[v] && tout[u] >= tout[v];
}

int LCA(int u, int v) {
    int l = ap[u], r = ap[v];
    if(l > r) swap(l, r);
    int len = r - l + 1, lg_len = __lg(len), res = min(sparse[lg_len][l], sparse[lg_len][r - (1 << lg_len) + 1]).ss;
    return res;
}

void Init(int N, int A[], int B[], int D[]) {
    n = N;
    G.resize(n); vt.resize(n);
    for(int i = 0; i < N - 1; ++i) {
        G[A[i]].emplace_back(B[i], D[i]);
        G[B[i]].emplace_back(A[i], D[i]);
    }
    dfs(0, 0); build_sparse();
}

long long Query(int S, int X[], int T, int Y[]) {
    queue<pii> q;

    for(int i = 0; i < S; ++i) {
        cur[X[i]] = 1;
        q.emplace(X[i], 0);
        vtn.emplace_back(X[i]);
    }
    for(int i = 0; i < T; ++i) {
        cur[Y[i]] = 2;
        vtn.emplace_back(Y[i]);
    }

    sort(all(vtn), [&](int u, int v) {
        return tin[u] < tin[v];
    });

    for(int i = 0; i < S + T - 1; ++i) {
        vtn.emplace_back(LCA(vtn[i], vtn[i + 1]));
    }

    sort(all(vtn), [&](int u, int v) {
        return tin[u] < tin[v];
    });
    vtn.erase(unique(all(vtn)), vtn.end());

    auto add_vt = [&](int u, int v, int w) {
        vt[u].emplace_back(v, w);
        vt[v].emplace_back(u, w);
    };

    stack<int> s;
    while (!s.empty()) s.pop();
    for(int i = 0; i < isz(vtn); ++i) {
        while(not s.empty() && not is_ancestor(s.top(), vtn[i])) s.pop();
        if(s.empty()) s.emplace(vtn[i]);
        else {
            add_vt(s.top(), vtn[i], dis[vtn[i]] - dis[s.top()]);
            s.emplace(vtn[i]);
        }
    }

    ll res = oo;

    auto dfs = [&](auto self, int v, int p) -> vll {
        vll cur_dis(2, oo);
        if(cur[v]) cur_dis[cur[v] - 1] = 0;
        for(auto &[u, w] : G[v]) {
            if(u == p) continue;
            vll tmp = self(self, u, v);
            for(int i = 0; i < 2; ++i)
                cur_dis[i] = min(cur_dis[i], tmp[i] + w);
        }
        res = min(res, accumulate(all(cur_dis), 0LL));
        return cur_dis;
    };

    dfs(dfs, vtn[0], 0);

    for (int i = 0; i < isz(vtn); i++){
        vt[vtn[i]].clear();
        cur[vtn[i]] = 0;
    }
    vtn.clear();

    return res;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 43608 KB Output is correct
2 Correct 1296 ms 58828 KB Output is correct
3 Correct 1451 ms 58708 KB Output is correct
4 Correct 1455 ms 58824 KB Output is correct
5 Correct 1575 ms 59516 KB Output is correct
6 Correct 775 ms 58704 KB Output is correct
7 Correct 1450 ms 58716 KB Output is correct
8 Correct 1427 ms 58960 KB Output is correct
9 Correct 1570 ms 59512 KB Output is correct
10 Correct 777 ms 58712 KB Output is correct
11 Correct 1452 ms 58960 KB Output is correct

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 43608 KB Output is correct
2 Execution timed out 8047 ms 241284 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 43608 KB Output is correct
2 Correct 1296 ms 58828 KB Output is correct
3 Correct 1451 ms 58708 KB Output is correct
4 Correct 1455 ms 58824 KB Output is correct
5 Correct 1575 ms 59516 KB Output is correct
6 Correct 775 ms 58704 KB Output is correct
7 Correct 1450 ms 58716 KB Output is correct
8 Correct 1427 ms 58960 KB Output is correct
9 Correct 1570 ms 59512 KB Output is correct
10 Correct 777 ms 58712 KB Output is correct
11 Correct 1452 ms 58960 KB Output is correct
12 Correct 12 ms 43608 KB Output is correct
13 Execution timed out 8047 ms 241284 KB Time limit exceeded
14 Halted 0 ms 0 KB -