oj.uz

답안 #230667

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
230667 2020-05-11T01:21:13 Z arbor 공장들 (JOI14_factories) C++14
100 / 100
 5332 ms 148364 KB 
#include <bits/stdc++.h>

#define all(x) x.begin(), x.end()
#define lc (i << 1)
#define rc (i << 1 | 1)
using namespace std;
using ll = long long;
using pii = pair<int, int>;
const int MN = 5e5 + 5, LN = 17, MOD = 1e9 + 7, INF = 0x3f3f3f3f, BSZ = 320;
vector<pii> g[MN];
int sz[MN], par[MN], dep[MN], qid[MN], id = 1;
ll dis[20][MN], dp[MN];
bool vis[MN];

int get_sz(int u, int p) {
    sz[u] = 1;
    for (pii e : g[u]) if (e.first != p && !vis[e.first])
            sz[u] += get_sz(e.first, u);
    return sz[u];
}

int centroid(int u, int p, int s) {
    for (pii e : g[u]) if (e.first != p && !vis[e.first] && sz[e.first] > s / 2)
            return centroid(e.first, u, s);
    return u;
}

void dfs(int u, int p, ll d, int lvl) {
    dis[lvl][u] = d;
    for (pii e : g[u]) if (e.first != p && !vis[e.first])
            dfs(e.first, u, d + e.second, lvl);
}

void go(int u, int p, int lvl) {
    int s = get_sz(u, -1);
    int c = centroid(u, -1, s);
    dep[c] = lvl;
    par[c] = p;
    dfs(c, -1, 0, lvl);
    vis[c] = true;
    for (pii e : g[c])
        if (!vis[e.first])
            go(e.first, c, lvl + 1);
}

void Init(int N, int A[], int B[], int D[]) {
    for (int i = 0; i < N - 1; i++) {
        int u = A[i], v = B[i], w = D[i];
        g[u].emplace_back(v, w);
        g[v].emplace_back(u, w);
    }
    go(0, -1, 0);
}

ll Query(int S, int X[], int T, int Y[]) {
    ll ret = LLONG_MAX;
    for (int i = 0; i < S; i++) {
        int cur = X[i];
        while (cur != -1) {
            if (qid[cur] != id) dp[cur] = dis[dep[cur]][X[i]], qid[cur] = id;
            else dp[cur] = min(dp[cur], dis[dep[cur]][X[i]]);
            cur = par[cur];
        }
    }
    for (int i = 0; i < T; i++) {
        int cur = Y[i];
        while (cur != -1) {
            if (qid[cur] == id) ret = min(ret, dp[cur] + dis[dep[cur]][Y[i]]);
            cur = par[cur];
        }
    }
    id++;
    return ret;
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 12544 KB Output is correct
2 Correct 383 ms 30456 KB Output is correct
3 Correct 411 ms 30584 KB Output is correct
4 Correct 411 ms 30584 KB Output is correct
5 Correct 442 ms 30840 KB Output is correct
6 Correct 305 ms 30072 KB Output is correct
7 Correct 416 ms 30588 KB Output is correct
8 Correct 420 ms 30528 KB Output is correct
9 Correct 439 ms 30712 KB Output is correct
10 Correct 311 ms 30012 KB Output is correct
11 Correct 416 ms 30456 KB Output is correct

Subtask #2
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 12288 KB Output is correct
2 Correct 2028 ms 115704 KB Output is correct
3 Correct 3123 ms 131528 KB Output is correct
4 Correct 757 ms 64992 KB Output is correct
5 Correct 4215 ms 148364 KB Output is correct
6 Correct 3196 ms 132984 KB Output is correct
7 Correct 982 ms 55032 KB Output is correct
8 Correct 453 ms 44012 KB Output is correct
9 Correct 1143 ms 58568 KB Output is correct
10 Correct 992 ms 56316 KB Output is correct

Subtask #3
67.0 / 67.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 12544 KB Output is correct
2 Correct 383 ms 30456 KB Output is correct
3 Correct 411 ms 30584 KB Output is correct
4 Correct 411 ms 30584 KB Output is correct
5 Correct 442 ms 30840 KB Output is correct
6 Correct 305 ms 30072 KB Output is correct
7 Correct 416 ms 30588 KB Output is correct
8 Correct 420 ms 30528 KB Output is correct
9 Correct 439 ms 30712 KB Output is correct
10 Correct 311 ms 30012 KB Output is correct
11 Correct 416 ms 30456 KB Output is correct
12 Correct 13 ms 12288 KB Output is correct
13 Correct 2028 ms 115704 KB Output is correct
14 Correct 3123 ms 131528 KB Output is correct
15 Correct 757 ms 64992 KB Output is correct
16 Correct 4215 ms 148364 KB Output is correct
17 Correct 3196 ms 132984 KB Output is correct
18 Correct 982 ms 55032 KB Output is correct
19 Correct 453 ms 44012 KB Output is correct
20 Correct 1143 ms 58568 KB Output is correct
21 Correct 992 ms 56316 KB Output is correct
22 Correct 2630 ms 116008 KB Output is correct
23 Correct 2467 ms 120440 KB Output is correct
24 Correct 4215 ms 133756 KB Output is correct
25 Correct 4169 ms 137032 KB Output is correct
26 Correct 4175 ms 133900 KB Output is correct
27 Correct 5332 ms 147880 KB Output is correct
28 Correct 942 ms 68832 KB Output is correct
29 Correct 3982 ms 133940 KB Output is correct
30 Correct 4089 ms 133476 KB Output is correct
31 Correct 4017 ms 133672 KB Output is correct
32 Correct 1198 ms 58744 KB Output is correct
33 Correct 454 ms 44008 KB Output is correct
34 Correct 772 ms 50280 KB Output is correct
35 Correct 766 ms 50040 KB Output is correct
36 Correct 994 ms 53048 KB Output is correct
37 Correct 1004 ms 53104 KB Output is correct