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답안 #776195

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
776195 2023-07-07T11:45:59 Z Desh03 경주 (Race) (IOI11_race) C++17
100 / 100
 357 ms 35084 KB 
#include "race.h"
#include <bits/stdc++.h>
using namespace std;

const int INF = 1E9;
int k, ans = INF;
vector<vector<pair<int, int>>> g;
vector<int> sz, dep, to, ds;
vector<bool> centroid;

void calc(int u, int p) {
    sz[u] = 1;
    for (auto [v, w] : g[u])
        if (v ^ p && !centroid[v])
            calc(v, u), sz[u] += sz[v];
}

int findcentroid(int u, int p, const int &s) {
    for (auto [v, w] : g[u])
        if (v ^ p && !centroid[v] && sz[v] > s)
            return findcentroid(v, u, s);
    return u;
}

void calcdep(int u, int p, int d) {
    dep[u] = d;
    for (auto [v, w] : g[u])
        if (v ^ p && !centroid[v])
            calcdep(v, u, d + 1);
}

void addmx(int u, int p, int length) {
    if (length > k) return;
    ds[length] = min(ds[length], dep[u]);
    to.push_back(length);
    for (auto [v, w] : g[u])
        if (v ^ p && !centroid[v])
            addmx(v, u, length + w);
}

void calcmx(int u, int p, int length) {
    if (length > k) return;
    ans = min(ans, dep[u] + ds[k - length]);
    for (auto [v, w] : g[u])
        if (v ^ p && !centroid[v])
            calcmx(v, u, length + w);
}

void decompose(int u) {
    calc(u, u);
    int x = findcentroid(u, u, sz[u] >> 1);
    calcdep(x, x, 0);
    centroid[x] = 1;
    for (auto [v, w] : g[x]) {
        if (!centroid[v]) {
            calcmx(v, x, w);
            addmx(v, x, w);
        }
    }
    ans = min(ans, ds[k]);
    for (int i : to) ds[i] = INF;
    to.clear();
    for (auto [v, w] : g[x])
        if (!centroid[v])
            decompose(v);
}

int best_path(int n, int k_, int h[][2], int l[]) {
    k = k_;
    g = vector<vector<pair<int, int>>> (n), centroid = vector<bool> (n), dep = vector<int> (n), ds = vector<int>(k + 1, INF), sz = dep;
    for (int i = 0; i < n - 1; i++) {
        int u = h[i][0], v = h[i][1], w = l[i];
        g[u].push_back({v, w});
        g[v].push_back({u, w});
    }
    decompose(0);
    return ans == INF ? -1 : ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 2 ms 3924 KB Output is correct
23 Correct 2 ms 3284 KB Output is correct
24 Correct 2 ms 3796 KB Output is correct
25 Correct 2 ms 3648 KB Output is correct
26 Correct 2 ms 1620 KB Output is correct
27 Correct 2 ms 3540 KB Output is correct
28 Correct 1 ms 1092 KB Output is correct
29 Correct 2 ms 1600 KB Output is correct
30 Correct 2 ms 1748 KB Output is correct
31 Correct 2 ms 2900 KB Output is correct
32 Correct 3 ms 3156 KB Output is correct
33 Correct 3 ms 3412 KB Output is correct
34 Correct 2 ms 2620 KB Output is correct
35 Correct 3 ms 3540 KB Output is correct
36 Correct 2 ms 4028 KB Output is correct
37 Correct 2 ms 3412 KB Output is correct
38 Correct 2 ms 2388 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 105 ms 9712 KB Output is correct
20 Correct 109 ms 9700 KB Output is correct
21 Correct 110 ms 9980 KB Output is correct
22 Correct 96 ms 10316 KB Output is correct
23 Correct 83 ms 9956 KB Output is correct
24 Correct 41 ms 9828 KB Output is correct
25 Correct 123 ms 12400 KB Output is correct
26 Correct 94 ms 15932 KB Output is correct
27 Correct 155 ms 19380 KB Output is correct
28 Correct 207 ms 30756 KB Output is correct
29 Correct 233 ms 29860 KB Output is correct
30 Correct 135 ms 19360 KB Output is correct
31 Correct 115 ms 19392 KB Output is correct
32 Correct 194 ms 19500 KB Output is correct
33 Correct 239 ms 18232 KB Output is correct
34 Correct 199 ms 19148 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 2 ms 3924 KB Output is correct
23 Correct 2 ms 3284 KB Output is correct
24 Correct 2 ms 3796 KB Output is correct
25 Correct 2 ms 3648 KB Output is correct
26 Correct 2 ms 1620 KB Output is correct
27 Correct 2 ms 3540 KB Output is correct
28 Correct 1 ms 1092 KB Output is correct
29 Correct 2 ms 1600 KB Output is correct
30 Correct 2 ms 1748 KB Output is correct
31 Correct 2 ms 2900 KB Output is correct
32 Correct 3 ms 3156 KB Output is correct
33 Correct 3 ms 3412 KB Output is correct
34 Correct 2 ms 2620 KB Output is correct
35 Correct 3 ms 3540 KB Output is correct
36 Correct 2 ms 4028 KB Output is correct
37 Correct 2 ms 3412 KB Output is correct
38 Correct 2 ms 2388 KB Output is correct
39 Correct 105 ms 9712 KB Output is correct
40 Correct 109 ms 9700 KB Output is correct
41 Correct 110 ms 9980 KB Output is correct
42 Correct 96 ms 10316 KB Output is correct
43 Correct 83 ms 9956 KB Output is correct
44 Correct 41 ms 9828 KB Output is correct
45 Correct 123 ms 12400 KB Output is correct
46 Correct 94 ms 15932 KB Output is correct
47 Correct 155 ms 19380 KB Output is correct
48 Correct 207 ms 30756 KB Output is correct
49 Correct 233 ms 29860 KB Output is correct
50 Correct 135 ms 19360 KB Output is correct
51 Correct 115 ms 19392 KB Output is correct
52 Correct 194 ms 19500 KB Output is correct
53 Correct 239 ms 18232 KB Output is correct
54 Correct 199 ms 19148 KB Output is correct
55 Correct 7 ms 1236 KB Output is correct
56 Correct 8 ms 1340 KB Output is correct
57 Correct 66 ms 10424 KB Output is correct
58 Correct 37 ms 10492 KB Output is correct
59 Correct 79 ms 16648 KB Output is correct
60 Correct 352 ms 35084 KB Output is correct
61 Correct 132 ms 19924 KB Output is correct
62 Correct 142 ms 24428 KB Output is correct
63 Correct 235 ms 24408 KB Output is correct
64 Correct 357 ms 22840 KB Output is correct
65 Correct 193 ms 20316 KB Output is correct
66 Correct 313 ms 31800 KB Output is correct
67 Correct 85 ms 25772 KB Output is correct
68 Correct 230 ms 24620 KB Output is correct
69 Correct 213 ms 24852 KB Output is correct
70 Correct 227 ms 23828 KB Output is correct