oj.uz

Submission #964770

# Submission time Handle Problem Language Result Execution time Memory
964770 2024-04-17T14:08:30 Z unkn0t Factories (JOI14_factories) C++17
100 / 100
 5450 ms 340684 KB 
#include <bits/stdc++.h>
 
#ifdef DEBUG
    #include <debug.hpp>
#else
    #define debug(...) 42
#endif
 
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
using namespace std;
 
const ll INF = 1e18;
 
vector<vector<pair<int, ll>>> gr;
vector<int> sz, used, act;
vector<ll> cls;
vector<vector<int>> cent;
vector<vector<ll>> dist;
int now = 0;
 
int find_sz(int v, int p) {
    sz[v] = 1;
    for (auto [to, w] : gr[v]) {
        if (used[to] || to == p) continue;
        sz[v] += find_sz(to, v);
    }
    return sz[v];
}
 
int centr(int v, int p, int cn) {
    bool flag = 1;
    while (flag) {
        flag = 0;
        for (auto [to, w] : gr[v]) {
            if (used[to] || to == p) continue;
            if (sz[to] > cn / 2) {
                p = v;
                v = to;
                flag = 1;
                break;
            }
        }
    }
    return v;
}
 
void dfs(int v, int c, int p = -1, ll d = 0) {
    cent[v].push_back(c);
    dist[v].push_back(d);
    assert(cent[v].size() <= 25);
    for (auto [to, w] : gr[v]) {
        if (used[to] || to == p) continue;
        dfs(to, c, v, d + w);
    }
} 
 
void Decomp(int v) {
    int cn = find_sz(v, v);
    int c = centr(v, v, cn); 
    used[c] = 1;
    dfs(c, c);
    for (auto [to, w] : gr[c]) {
        if (used[to]) continue;
        Decomp(to);
    }
}
 
void Init(int N, int A[], int B[], int D[]) {
    gr.assign(N, {}); 
    used.assign(N, 0);
    sz.assign(N, 0);
    cent.assign(N, {});
    dist.assign(N, {});
    cls.assign(N, INF);
    act.assign(N, 0);
    
    for (int i = 0; i < N - 1; ++i) {
        gr[A[i]].emplace_back(B[i], D[i]);
        gr[B[i]].emplace_back(A[i], D[i]);
    }
 
    Decomp(0);
}
 
void Update(int v) {
    for (size_t j = 0; j < cent[v].size(); ++j) {
        int c = cent[v][j];
        if (act[c] == now) {
            cls[c] = min(cls[c], dist[v][j]);
        } else {
            cls[c] = dist[v][j]; 
            act[c] = now;
        }
    }
}
 
ll GetMin(int v) {
    ll res = INF;
    for (size_t j = 0; j < cent[v].size(); ++j) {
        int c = cent[v][j];
        if (act[c] == now) {
            res = min(res, dist[v][j] + cls[c]);
        }
    }
    return res;
}
 
ll Query(int S, int X[], int T, int Y[]) {
    // go through all X[i] centroids and update cls  
    for (int i = 0; i < S; ++i) {
        Update(X[i]);
    }
 
    // go through all Y[i] centroids and update min(res, dist[Y[i]][c] + cls[c])
    ll res = INF;
    for (int i = 0; i < T; ++i) {
        res = min(res, GetMin(Y[i])); 
    }
 
    // Update actuality
    ++now;
 
    return res;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 16984 KB Output is correct
2 Correct 229 ms 30272 KB Output is correct
3 Correct 237 ms 30584 KB Output is correct
4 Correct 253 ms 30576 KB Output is correct
5 Correct 244 ms 31104 KB Output is correct
6 Correct 156 ms 31404 KB Output is correct
7 Correct 236 ms 32176 KB Output is correct
8 Correct 282 ms 32044 KB Output is correct
9 Correct 253 ms 32584 KB Output is correct
10 Correct 158 ms 31412 KB Output is correct
11 Correct 254 ms 32212 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 17040 KB Output is correct
2 Correct 2527 ms 215016 KB Output is correct
3 Correct 3878 ms 265912 KB Output is correct
4 Correct 964 ms 141664 KB Output is correct
5 Correct 4492 ms 340684 KB Output is correct
6 Correct 4086 ms 268248 KB Output is correct
7 Correct 1004 ms 72684 KB Output is correct
8 Correct 300 ms 55892 KB Output is correct
9 Correct 967 ms 83228 KB Output is correct
10 Correct 994 ms 73332 KB Output is correct

Subtask #3
67.0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 16984 KB Output is correct
2 Correct 229 ms 30272 KB Output is correct
3 Correct 237 ms 30584 KB Output is correct
4 Correct 253 ms 30576 KB Output is correct
5 Correct 244 ms 31104 KB Output is correct
6 Correct 156 ms 31404 KB Output is correct
7 Correct 236 ms 32176 KB Output is correct
8 Correct 282 ms 32044 KB Output is correct
9 Correct 253 ms 32584 KB Output is correct
10 Correct 158 ms 31412 KB Output is correct
11 Correct 254 ms 32212 KB Output is correct
12 Correct 3 ms 17040 KB Output is correct
13 Correct 2527 ms 215016 KB Output is correct
14 Correct 3878 ms 265912 KB Output is correct
15 Correct 964 ms 141664 KB Output is correct
16 Correct 4492 ms 340684 KB Output is correct
17 Correct 4086 ms 268248 KB Output is correct
18 Correct 1004 ms 72684 KB Output is correct
19 Correct 300 ms 55892 KB Output is correct
20 Correct 967 ms 83228 KB Output is correct
21 Correct 994 ms 73332 KB Output is correct
22 Correct 2929 ms 219252 KB Output is correct
23 Correct 3119 ms 222348 KB Output is correct
24 Correct 4610 ms 275276 KB Output is correct
25 Correct 4622 ms 278020 KB Output is correct
26 Correct 4738 ms 276424 KB Output is correct
27 Correct 5450 ms 336232 KB Output is correct
28 Correct 1197 ms 148288 KB Output is correct
29 Correct 4798 ms 275448 KB Output is correct
30 Correct 4753 ms 274416 KB Output is correct
31 Correct 4533 ms 276120 KB Output is correct
32 Correct 1180 ms 83660 KB Output is correct
33 Correct 377 ms 55756 KB Output is correct
34 Correct 779 ms 67288 KB Output is correct
35 Correct 755 ms 67660 KB Output is correct
36 Correct 1024 ms 71604 KB Output is correct
37 Correct 1006 ms 71624 KB Output is correct