oj.uz

Submission #855211

# Submission time Handle Problem Language Result Execution time Memory
855211 2023-09-30T17:58:46 Z thisistotallymyusername Race (IOI11_race) C++14
100 / 100
 294 ms 65580 KB 
/*
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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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