답안 #855211

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
855211	2023-09-30T17:58:46 Z	thisistotallymyusername	경주 (Race) (IOI11_race)	C++14	100 / 100	294 ms	65580 KB

race

/*
dsu: (ds[y] - ds[x]) + (ds[z] - ds[x]) = k
     ds[z] = k + 2 ds[x] - ds[y];

     # edges = (dep[y] - dep[x]) + (dep[z] - dep[x])
 */

#include <iostream>
#include <algorithm>
#include <cstring>
#include <map>

using namespace std;

#define F first
#define S second

const int N = 200010, INF = 0x3f3f3f3f;

int res = INF;
int h[2 * N], e[2 * N], ne[2 * N], w[2 * N], idx;
map<int, int> dep[N];

void add(int a, int b, int c) {
    e[idx] = b, w[idx] = c, ne[idx] = h[a], h[a] = idx++;
}

void dfs(int u, int fa, int dist, int depth, int k) {
    dep[u][dist] = depth;
    for (int i = h[u]; i != -1; i = ne[i]) {
        int j = e[i];
        if (j == fa) {
            continue;
        }
        dfs(j, u, dist + w[i], depth + 1, k);
        if (dep[u].size() < dep[j].size()) {
            swap(dep[u], dep[j]);
        }
        for (auto t : dep[j]) {
            int ds = k + 2 * dist - t.F;
            if (ds >= 0 && dep[u].count(ds) > 0) {
                res = min(res, dep[u][ds] + dep[j][t.F] - 2 * depth);
            }
        }
        for (auto t : dep[j]) {
            if (dep[u][t.F]) dep[u][t.F] = min(dep[u][t.F], t.S);
            else dep[u][t.F] = t.S;
        }
        dep[j].clear();
    }
}


int best_path(int N, int K, int H[][2], int L[]) {
    memset(h, -1, sizeof h);
    for (int i = 0; i < N - 1; i++) {
        add(H[i][0] + 1, H[i][1] + 1, L[i]);
        add(H[i][1] + 1, H[i][0] + 1, L[i]);
    }
    dfs(1, -1, 0, 1, K);
    return (res == INF ? -1 : res);
}

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	19544 KB	Output is correct
2	Correct	3 ms	19548 KB	Output is correct
3	Correct	3 ms	19548 KB	Output is correct
4	Correct	4 ms	19796 KB	Output is correct
5	Correct	5 ms	19548 KB	Output is correct
6	Correct	3 ms	19676 KB	Output is correct
7	Correct	4 ms	19548 KB	Output is correct
8	Correct	4 ms	19548 KB	Output is correct
9	Correct	3 ms	19548 KB	Output is correct
10	Correct	3 ms	19548 KB	Output is correct
11	Correct	4 ms	19668 KB	Output is correct
12	Correct	3 ms	19544 KB	Output is correct
13	Correct	3 ms	19548 KB	Output is correct
14	Correct	4 ms	19548 KB	Output is correct
15	Correct	3 ms	19676 KB	Output is correct
16	Correct	4 ms	19548 KB	Output is correct
17	Correct	3 ms	19548 KB	Output is correct
18	Correct	3 ms	19668 KB	Output is correct

Subtask #2
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	19544 KB	Output is correct
2	Correct	3 ms	19548 KB	Output is correct
3	Correct	3 ms	19548 KB	Output is correct
4	Correct	4 ms	19796 KB	Output is correct
5	Correct	5 ms	19548 KB	Output is correct
6	Correct	3 ms	19676 KB	Output is correct
7	Correct	4 ms	19548 KB	Output is correct
8	Correct	4 ms	19548 KB	Output is correct
9	Correct	3 ms	19548 KB	Output is correct
10	Correct	3 ms	19548 KB	Output is correct
11	Correct	4 ms	19668 KB	Output is correct
12	Correct	3 ms	19544 KB	Output is correct
13	Correct	3 ms	19548 KB	Output is correct
14	Correct	4 ms	19548 KB	Output is correct
15	Correct	3 ms	19676 KB	Output is correct
16	Correct	4 ms	19548 KB	Output is correct
17	Correct	3 ms	19548 KB	Output is correct
18	Correct	3 ms	19668 KB	Output is correct
19	Correct	3 ms	19548 KB	Output is correct
20	Correct	3 ms	19548 KB	Output is correct
21	Correct	4 ms	19548 KB	Output is correct
22	Correct	4 ms	19804 KB	Output is correct
23	Correct	5 ms	19800 KB	Output is correct
24	Correct	4 ms	19804 KB	Output is correct
25	Correct	4 ms	19804 KB	Output is correct
26	Correct	4 ms	19804 KB	Output is correct
27	Correct	4 ms	19544 KB	Output is correct
28	Correct	4 ms	19804 KB	Output is correct
29	Correct	4 ms	19804 KB	Output is correct
30	Correct	4 ms	19804 KB	Output is correct
31	Correct	5 ms	19804 KB	Output is correct
32	Correct	4 ms	19804 KB	Output is correct
33	Correct	4 ms	19780 KB	Output is correct
34	Correct	4 ms	19804 KB	Output is correct
35	Correct	4 ms	19804 KB	Output is correct
36	Correct	4 ms	19804 KB	Output is correct
37	Correct	4 ms	19804 KB	Output is correct
38	Correct	4 ms	19804 KB	Output is correct

Subtask #3
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	19544 KB	Output is correct
2	Correct	3 ms	19548 KB	Output is correct
3	Correct	3 ms	19548 KB	Output is correct
4	Correct	4 ms	19796 KB	Output is correct
5	Correct	5 ms	19548 KB	Output is correct
6	Correct	3 ms	19676 KB	Output is correct
7	Correct	4 ms	19548 KB	Output is correct
8	Correct	4 ms	19548 KB	Output is correct
9	Correct	3 ms	19548 KB	Output is correct
10	Correct	3 ms	19548 KB	Output is correct
11	Correct	4 ms	19668 KB	Output is correct
12	Correct	3 ms	19544 KB	Output is correct
13	Correct	3 ms	19548 KB	Output is correct
14	Correct	4 ms	19548 KB	Output is correct
15	Correct	3 ms	19676 KB	Output is correct
16	Correct	4 ms	19548 KB	Output is correct
17	Correct	3 ms	19548 KB	Output is correct
18	Correct	3 ms	19668 KB	Output is correct
19	Correct	64 ms	23380 KB	Output is correct
20	Correct	68 ms	23892 KB	Output is correct
21	Correct	58 ms	23132 KB	Output is correct
22	Correct	66 ms	23388 KB	Output is correct
23	Correct	89 ms	23708 KB	Output is correct
24	Correct	68 ms	23472 KB	Output is correct
25	Correct	51 ms	33876 KB	Output is correct
26	Correct	43 ms	43600 KB	Output is correct
27	Correct	87 ms	24912 KB	Output is correct
28	Correct	168 ms	65580 KB	Output is correct
29	Correct	166 ms	63824 KB	Output is correct
30	Correct	88 ms	24924 KB	Output is correct
31	Correct	88 ms	24912 KB	Output is correct
32	Correct	96 ms	25324 KB	Output is correct
33	Correct	120 ms	26208 KB	Output is correct
34	Correct	196 ms	36180 KB	Output is correct

Subtask #4
57.0 / 57.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	19544 KB	Output is correct
2	Correct	3 ms	19548 KB	Output is correct
3	Correct	3 ms	19548 KB	Output is correct
4	Correct	4 ms	19796 KB	Output is correct
5	Correct	5 ms	19548 KB	Output is correct
6	Correct	3 ms	19676 KB	Output is correct
7	Correct	4 ms	19548 KB	Output is correct
8	Correct	4 ms	19548 KB	Output is correct
9	Correct	3 ms	19548 KB	Output is correct
10	Correct	3 ms	19548 KB	Output is correct
11	Correct	4 ms	19668 KB	Output is correct
12	Correct	3 ms	19544 KB	Output is correct
13	Correct	3 ms	19548 KB	Output is correct
14	Correct	4 ms	19548 KB	Output is correct
15	Correct	3 ms	19676 KB	Output is correct
16	Correct	4 ms	19548 KB	Output is correct
17	Correct	3 ms	19548 KB	Output is correct
18	Correct	3 ms	19668 KB	Output is correct
19	Correct	3 ms	19548 KB	Output is correct
20	Correct	3 ms	19548 KB	Output is correct
21	Correct	4 ms	19548 KB	Output is correct
22	Correct	4 ms	19804 KB	Output is correct
23	Correct	5 ms	19800 KB	Output is correct
24	Correct	4 ms	19804 KB	Output is correct
25	Correct	4 ms	19804 KB	Output is correct
26	Correct	4 ms	19804 KB	Output is correct
27	Correct	4 ms	19544 KB	Output is correct
28	Correct	4 ms	19804 KB	Output is correct
29	Correct	4 ms	19804 KB	Output is correct
30	Correct	4 ms	19804 KB	Output is correct
31	Correct	5 ms	19804 KB	Output is correct
32	Correct	4 ms	19804 KB	Output is correct
33	Correct	4 ms	19780 KB	Output is correct
34	Correct	4 ms	19804 KB	Output is correct
35	Correct	4 ms	19804 KB	Output is correct
36	Correct	4 ms	19804 KB	Output is correct
37	Correct	4 ms	19804 KB	Output is correct
38	Correct	4 ms	19804 KB	Output is correct
39	Correct	64 ms	23380 KB	Output is correct
40	Correct	68 ms	23892 KB	Output is correct
41	Correct	58 ms	23132 KB	Output is correct
42	Correct	66 ms	23388 KB	Output is correct
43	Correct	89 ms	23708 KB	Output is correct
44	Correct	68 ms	23472 KB	Output is correct
45	Correct	51 ms	33876 KB	Output is correct
46	Correct	43 ms	43600 KB	Output is correct
47	Correct	87 ms	24912 KB	Output is correct
48	Correct	168 ms	65580 KB	Output is correct
49	Correct	166 ms	63824 KB	Output is correct
50	Correct	88 ms	24924 KB	Output is correct
51	Correct	88 ms	24912 KB	Output is correct
52	Correct	96 ms	25324 KB	Output is correct
53	Correct	120 ms	26208 KB	Output is correct
54	Correct	196 ms	36180 KB	Output is correct
55	Correct	14 ms	20316 KB	Output is correct
56	Correct	7 ms	19808 KB	Output is correct
57	Correct	37 ms	23300 KB	Output is correct
58	Correct	33 ms	22872 KB	Output is correct
59	Correct	58 ms	43620 KB	Output is correct
60	Correct	157 ms	64340 KB	Output is correct
61	Correct	120 ms	26448 KB	Output is correct
62	Correct	86 ms	25056 KB	Output is correct
63	Correct	98 ms	25308 KB	Output is correct
64	Correct	266 ms	32196 KB	Output is correct
65	Correct	294 ms	36500 KB	Output is correct
66	Correct	164 ms	60316 KB	Output is correct
67	Correct	78 ms	25172 KB	Output is correct
68	Correct	183 ms	36948 KB	Output is correct
69	Correct	180 ms	33880 KB	Output is correct
70	Correct	186 ms	36432 KB	Output is correct

답안 #855211

Compilation message

Subtask #1 9.0 / 9.0

Subtask #2 12.0 / 12.0

Subtask #3 22.0 / 22.0

Subtask #4 57.0 / 57.0

Subtask #1
9.0 / 9.0

Subtask #2
12.0 / 12.0

Subtask #3
22.0 / 22.0

Subtask #4
57.0 / 57.0