답안 #379296

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
379296	2021-03-17T22:03:48 Z	justiny7	경주 (Race) (IOI11_race)	C++17	100 / 100	1118 ms	38880 KB

race

//#include "race.h"
#include <bits/stdc++.h>
using namespace std;

const int mxN=2e5+1, INF=1e9;
int k, ans=INF, sz[mxN];
vector<pair<int, int>> adj[mxN], vals;
map<int, int> mn;
bool vis[mxN];

int dfs_sz(int v, int p=-1) {
    sz[v]=1;
    for (auto [u, d]:adj[v])
        if (!vis[u] && u^p)
            sz[v]+=dfs_sz(u, v);
    return sz[v];
}
int dfs_centroid(int tot, int v, int p=-1) {
    for (auto [u, d]:adj[v])
        if (!vis[u] && u^p && sz[u]*2>tot)
            return dfs_centroid(tot, u, v);
    return v;
}
void dfs(int v, int len, int p=-1, int dep=1) {
    vals.emplace_back(dep, len);
    for (auto [u, d]:adj[v])
        if (!vis[u] && u^p && len+d<=k)
            dfs(u, len+d, v, dep+1);
}
void decomp(int x=0) {
    int v=dfs_centroid(dfs_sz(x), x);
    vis[v]=1;
    mn.clear();
    mn[0]=0;
    for (auto [u, d]:adj[v]) {
        if (vis[u])
            continue;
        vals.clear();
        dfs(u, d);
        for (auto [dep, len]:vals)
            if (mn.count(k-len))
                ans=min(ans, dep+mn[k-len]);
        for (auto [dep, len]:vals) {
            if (mn.count(len))
                mn[len]=min(mn[len], dep);
            else
                mn[len]=dep;
        }
    }
    for (auto [u, d]:adj[v])
        if (!vis[u])
            decomp(u);
}

int best_path(int N, int K, int H[][2], int L[]) {
    k=K;
    for (int i=0; i<N; ++i)
        adj[i].clear();
    for (int i=0; i<N-1; ++i) {
        adj[H[i][0]].emplace_back(H[i][1], L[i]);
        adj[H[i][1]].emplace_back(H[i][0], L[i]);
    }
    decomp();
    return (ans==INF?-1:ans);
}

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	5100 KB	Output is correct
2	Correct	4 ms	5100 KB	Output is correct
3	Correct	4 ms	5100 KB	Output is correct
4	Correct	4 ms	5100 KB	Output is correct
5	Correct	4 ms	5100 KB	Output is correct
6	Correct	4 ms	5100 KB	Output is correct
7	Correct	4 ms	5100 KB	Output is correct
8	Correct	4 ms	5100 KB	Output is correct
9	Correct	4 ms	5100 KB	Output is correct
10	Correct	4 ms	5100 KB	Output is correct
11	Correct	4 ms	5100 KB	Output is correct
12	Correct	4 ms	5228 KB	Output is correct
13	Correct	4 ms	5100 KB	Output is correct
14	Correct	4 ms	5100 KB	Output is correct
15	Correct	4 ms	5100 KB	Output is correct
16	Correct	4 ms	5100 KB	Output is correct
17	Correct	4 ms	5100 KB	Output is correct
18	Correct	4 ms	5100 KB	Output is correct

Subtask #2
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	5100 KB	Output is correct
2	Correct	4 ms	5100 KB	Output is correct
3	Correct	4 ms	5100 KB	Output is correct
4	Correct	4 ms	5100 KB	Output is correct
5	Correct	4 ms	5100 KB	Output is correct
6	Correct	4 ms	5100 KB	Output is correct
7	Correct	4 ms	5100 KB	Output is correct
8	Correct	4 ms	5100 KB	Output is correct
9	Correct	4 ms	5100 KB	Output is correct
10	Correct	4 ms	5100 KB	Output is correct
11	Correct	4 ms	5100 KB	Output is correct
12	Correct	4 ms	5228 KB	Output is correct
13	Correct	4 ms	5100 KB	Output is correct
14	Correct	4 ms	5100 KB	Output is correct
15	Correct	4 ms	5100 KB	Output is correct
16	Correct	4 ms	5100 KB	Output is correct
17	Correct	4 ms	5100 KB	Output is correct
18	Correct	4 ms	5100 KB	Output is correct
19	Correct	4 ms	5228 KB	Output is correct
20	Correct	4 ms	5100 KB	Output is correct
21	Correct	5 ms	5100 KB	Output is correct
22	Correct	4 ms	5100 KB	Output is correct
23	Correct	4 ms	5100 KB	Output is correct
24	Correct	4 ms	5100 KB	Output is correct
25	Correct	5 ms	5100 KB	Output is correct
26	Correct	6 ms	5100 KB	Output is correct
27	Correct	5 ms	5100 KB	Output is correct
28	Correct	5 ms	5100 KB	Output is correct
29	Correct	5 ms	5100 KB	Output is correct
30	Correct	5 ms	5100 KB	Output is correct
31	Correct	5 ms	5100 KB	Output is correct
32	Correct	5 ms	5100 KB	Output is correct
33	Correct	7 ms	5100 KB	Output is correct
34	Correct	6 ms	5100 KB	Output is correct
35	Correct	6 ms	5100 KB	Output is correct
36	Correct	5 ms	5100 KB	Output is correct
37	Correct	5 ms	5100 KB	Output is correct
38	Correct	5 ms	5100 KB	Output is correct

Subtask #3
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	5100 KB	Output is correct
2	Correct	4 ms	5100 KB	Output is correct
3	Correct	4 ms	5100 KB	Output is correct
4	Correct	4 ms	5100 KB	Output is correct
5	Correct	4 ms	5100 KB	Output is correct
6	Correct	4 ms	5100 KB	Output is correct
7	Correct	4 ms	5100 KB	Output is correct
8	Correct	4 ms	5100 KB	Output is correct
9	Correct	4 ms	5100 KB	Output is correct
10	Correct	4 ms	5100 KB	Output is correct
11	Correct	4 ms	5100 KB	Output is correct
12	Correct	4 ms	5228 KB	Output is correct
13	Correct	4 ms	5100 KB	Output is correct
14	Correct	4 ms	5100 KB	Output is correct
15	Correct	4 ms	5100 KB	Output is correct
16	Correct	4 ms	5100 KB	Output is correct
17	Correct	4 ms	5100 KB	Output is correct
18	Correct	4 ms	5100 KB	Output is correct
19	Correct	229 ms	11884 KB	Output is correct
20	Correct	220 ms	11756 KB	Output is correct
21	Correct	251 ms	12016 KB	Output is correct
22	Correct	270 ms	12264 KB	Output is correct
23	Correct	109 ms	12140 KB	Output is correct
24	Correct	112 ms	11884 KB	Output is correct
25	Correct	163 ms	14444 KB	Output is correct
26	Correct	118 ms	18032 KB	Output is correct
27	Correct	267 ms	18796 KB	Output is correct
28	Correct	329 ms	30220 KB	Output is correct
29	Correct	334 ms	29544 KB	Output is correct
30	Correct	273 ms	18796 KB	Output is correct
31	Correct	253 ms	18924 KB	Output is correct
32	Correct	300 ms	19120 KB	Output is correct
33	Correct	355 ms	17832 KB	Output is correct
34	Correct	238 ms	18540 KB	Output is correct

Subtask #4
57.0 / 57.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	5100 KB	Output is correct
2	Correct	4 ms	5100 KB	Output is correct
3	Correct	4 ms	5100 KB	Output is correct
4	Correct	4 ms	5100 KB	Output is correct
5	Correct	4 ms	5100 KB	Output is correct
6	Correct	4 ms	5100 KB	Output is correct
7	Correct	4 ms	5100 KB	Output is correct
8	Correct	4 ms	5100 KB	Output is correct
9	Correct	4 ms	5100 KB	Output is correct
10	Correct	4 ms	5100 KB	Output is correct
11	Correct	4 ms	5100 KB	Output is correct
12	Correct	4 ms	5228 KB	Output is correct
13	Correct	4 ms	5100 KB	Output is correct
14	Correct	4 ms	5100 KB	Output is correct
15	Correct	4 ms	5100 KB	Output is correct
16	Correct	4 ms	5100 KB	Output is correct
17	Correct	4 ms	5100 KB	Output is correct
18	Correct	4 ms	5100 KB	Output is correct
19	Correct	4 ms	5228 KB	Output is correct
20	Correct	4 ms	5100 KB	Output is correct
21	Correct	5 ms	5100 KB	Output is correct
22	Correct	4 ms	5100 KB	Output is correct
23	Correct	4 ms	5100 KB	Output is correct
24	Correct	4 ms	5100 KB	Output is correct
25	Correct	5 ms	5100 KB	Output is correct
26	Correct	6 ms	5100 KB	Output is correct
27	Correct	5 ms	5100 KB	Output is correct
28	Correct	5 ms	5100 KB	Output is correct
29	Correct	5 ms	5100 KB	Output is correct
30	Correct	5 ms	5100 KB	Output is correct
31	Correct	5 ms	5100 KB	Output is correct
32	Correct	5 ms	5100 KB	Output is correct
33	Correct	7 ms	5100 KB	Output is correct
34	Correct	6 ms	5100 KB	Output is correct
35	Correct	6 ms	5100 KB	Output is correct
36	Correct	5 ms	5100 KB	Output is correct
37	Correct	5 ms	5100 KB	Output is correct
38	Correct	5 ms	5100 KB	Output is correct
39	Correct	229 ms	11884 KB	Output is correct
40	Correct	220 ms	11756 KB	Output is correct
41	Correct	251 ms	12016 KB	Output is correct
42	Correct	270 ms	12264 KB	Output is correct
43	Correct	109 ms	12140 KB	Output is correct
44	Correct	112 ms	11884 KB	Output is correct
45	Correct	163 ms	14444 KB	Output is correct
46	Correct	118 ms	18032 KB	Output is correct
47	Correct	267 ms	18796 KB	Output is correct
48	Correct	329 ms	30220 KB	Output is correct
49	Correct	334 ms	29544 KB	Output is correct
50	Correct	273 ms	18796 KB	Output is correct
51	Correct	253 ms	18924 KB	Output is correct
52	Correct	300 ms	19120 KB	Output is correct
53	Correct	355 ms	17832 KB	Output is correct
54	Correct	238 ms	18540 KB	Output is correct
55	Correct	23 ms	5888 KB	Output is correct
56	Correct	17 ms	5740 KB	Output is correct
57	Correct	154 ms	12524 KB	Output is correct
58	Correct	59 ms	11616 KB	Output is correct
59	Correct	314 ms	21484 KB	Output is correct
60	Correct	982 ms	38880 KB	Output is correct
61	Correct	333 ms	19328 KB	Output is correct
62	Correct	342 ms	19180 KB	Output is correct
63	Correct	416 ms	19068 KB	Output is correct
64	Correct	1118 ms	24544 KB	Output is correct
65	Correct	304 ms	19756 KB	Output is correct
66	Correct	655 ms	27628 KB	Output is correct
67	Correct	163 ms	19548 KB	Output is correct
68	Correct	496 ms	23276 KB	Output is correct
69	Correct	554 ms	23276 KB	Output is correct
70	Correct	452 ms	22508 KB	Output is correct

답안 #379296

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