oj.uz

Submission #843412

# Submission time Handle Problem Language Result Execution time Memory
843412 2023-09-04T01:46:12 Z socpite Factories (JOI14_factories) C++14
15 / 100
 8000 ms 152688 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 = 5e5 + 5;
const ll oo = 1e18;  
 
int n;
vector<vii> G;
 
vi vtn;
vector<vii> vt;
 
ll dis[mxN];
pii sparse[19][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() {
    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);
    return min(sparse[lg_len][l], sparse[lg_len][r - (1 << lg_len) + 1]).ss;
}
 
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;
    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], -1);
 
    for(int i = 0; i < S; ++i) {
        cur[X[i]] = 0;
        vt[X[i]].clear();
    }
    for(int i = 0; i < T; ++i) {
        cur[Y[i]] = 0;
        vt[Y[i]].clear();
    }
    vtn.clear();
 
    return res;
}

Compilation message

factories.cpp: In function 'void dfs(int, int)':
factories.cpp:38:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   38 |     for(auto &[u, w] : G[v]) {
      |               ^
factories.cpp: In lambda function:
factories.cpp:121:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  121 |         for(auto &[u, w] : G[v]) {
      |                   ^

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 45660 KB Output is correct
2 Correct 1318 ms 57268 KB Output is correct
3 Correct 1525 ms 57828 KB Output is correct
4 Correct 1482 ms 57792 KB Output is correct
5 Correct 1573 ms 57244 KB Output is correct
6 Correct 786 ms 57004 KB Output is correct
7 Correct 1491 ms 57688 KB Output is correct
8 Correct 1522 ms 57780 KB Output is correct
9 Correct 1656 ms 57276 KB Output is correct
10 Correct 843 ms 56992 KB Output is correct
11 Correct 1602 ms 57596 KB Output is correct

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 45660 KB Output is correct
2 Execution timed out 8099 ms 152688 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 45660 KB Output is correct
2 Correct 1318 ms 57268 KB Output is correct
3 Correct 1525 ms 57828 KB Output is correct
4 Correct 1482 ms 57792 KB Output is correct
5 Correct 1573 ms 57244 KB Output is correct
6 Correct 786 ms 57004 KB Output is correct
7 Correct 1491 ms 57688 KB Output is correct
8 Correct 1522 ms 57780 KB Output is correct
9 Correct 1656 ms 57276 KB Output is correct
10 Correct 843 ms 56992 KB Output is correct
11 Correct 1602 ms 57596 KB Output is correct
12 Correct 14 ms 45660 KB Output is correct
13 Execution timed out 8099 ms 152688 KB Time limit exceeded
14 Halted 0 ms 0 KB -