답안 #302333

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
302333	2020-09-18T15:43:27 Z	nhdtxdy	경주 (Race) (IOI11_race)	C++17	100 / 100	512 ms	73668 KB

race

#include <bits/stdc++.h>
#define eb emplace_back
#define Size(v) (int)v.size()
using namespace std;

// Always
const int nax = 2e5 + 5, INF = 1e9 + 7;
int n, k;
vector<pair<int, int>> adj[nax];
unordered_map<int, int> vec[nax];
int dist[nax], ans[nax], sz[nax], dep[nax];

void getsz(int v, int p = 0) {
	sz[v] = 1;
	for (auto &q : adj[v]) {
		int c = q.first, w = q.second;
		if (c == p) continue;
		dep[c] = dep[v] + 1;
		dist[c] = dist[v] + w;
		getsz(c, v);
		sz[v] += sz[c];
	}
}

void dfs(int v, int p = 0) {
	int maxi = -1, bigchild = -1;
	for (auto &q : adj[v]) {
		int u = q.first;
		if (u == p) continue;
		if (maxi < sz[u]) {
			maxi = sz[u];
			bigchild = u;
		}
	}
	for (auto &q : adj[v]) {
		int u = q.first;
		if (u == p || u == bigchild) continue;
		dfs(u, v);
	}
	if (bigchild != -1) {
		dfs(bigchild, v);
		swap(vec[v], vec[bigchild]);
	}
	vec[v][dist[v]] = dep[v];	
	int subtract = dist[v];
	if (vec[v].find(k + dist[v]) != vec[v].end()) {
		ans[v] = min(ans[v], vec[v][k + dist[v]] - dep[v]);
	}
	int target = k + 2 * subtract;
	for (auto &q : adj[v]) {
		int c = q.first;
		if (c == p || c == bigchild) continue;
		if (vec[c].find(k + dist[v]) != vec[c].end()) {
			ans[v] = min(ans[v], vec[c][k + dist[v]] - dep[v]);
		}
		for (auto &u : vec[c]) {
			if (vec[v].find(target - u.first) != vec[v].end()) {
				ans[v] = min(ans[v], u.second + vec[v][target - u.first] - 2 * dep[v]);
			}
		}
		for (auto &u : vec[c]) {
			if (vec[v].find(u.first) != vec[v].end()) vec[v][u.first] = min(vec[v][u.first], u.second);
			else vec[v][u.first] = u.second;
		}
	}
}

int best_path(int N, int K, int H[][2], int L[]) {
	fill(ans, ans + nax, INF);
	n = N;
	k = K;
	for (int i = 0; i < n - 1; ++i) {
		int u = H[i][0], v = H[i][1];
		++u, ++v;
		adj[u].eb(v, L[i]);
		adj[v].eb(u, L[i]);
	}
	getsz(1);
	dfs(1);
	int res = INF;
	for (int i = 1; i <= n; ++i) res = min(res, ans[i]);
	if (res == INF) return -1;
	return res;
}

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	12 ms	16768 KB	Output is correct
2	Correct	11 ms	16768 KB	Output is correct
3	Correct	11 ms	16768 KB	Output is correct
4	Correct	11 ms	16768 KB	Output is correct
5	Correct	11 ms	16768 KB	Output is correct
6	Correct	11 ms	16768 KB	Output is correct
7	Correct	12 ms	16768 KB	Output is correct
8	Correct	12 ms	16768 KB	Output is correct
9	Correct	12 ms	16768 KB	Output is correct
10	Correct	11 ms	16768 KB	Output is correct
11	Correct	11 ms	16768 KB	Output is correct
12	Correct	11 ms	16768 KB	Output is correct
13	Correct	12 ms	16768 KB	Output is correct
14	Correct	11 ms	16768 KB	Output is correct
15	Correct	11 ms	16768 KB	Output is correct
16	Correct	11 ms	16768 KB	Output is correct
17	Correct	11 ms	16896 KB	Output is correct
18	Correct	12 ms	16768 KB	Output is correct

Subtask #2
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	12 ms	16768 KB	Output is correct
2	Correct	11 ms	16768 KB	Output is correct
3	Correct	11 ms	16768 KB	Output is correct
4	Correct	11 ms	16768 KB	Output is correct
5	Correct	11 ms	16768 KB	Output is correct
6	Correct	11 ms	16768 KB	Output is correct
7	Correct	12 ms	16768 KB	Output is correct
8	Correct	12 ms	16768 KB	Output is correct
9	Correct	12 ms	16768 KB	Output is correct
10	Correct	11 ms	16768 KB	Output is correct
11	Correct	11 ms	16768 KB	Output is correct
12	Correct	11 ms	16768 KB	Output is correct
13	Correct	12 ms	16768 KB	Output is correct
14	Correct	11 ms	16768 KB	Output is correct
15	Correct	11 ms	16768 KB	Output is correct
16	Correct	11 ms	16768 KB	Output is correct
17	Correct	11 ms	16896 KB	Output is correct
18	Correct	12 ms	16768 KB	Output is correct
19	Correct	11 ms	16768 KB	Output is correct
20	Correct	12 ms	16768 KB	Output is correct
21	Correct	13 ms	16896 KB	Output is correct
22	Correct	13 ms	17024 KB	Output is correct
23	Correct	12 ms	17024 KB	Output is correct
24	Correct	12 ms	17024 KB	Output is correct
25	Correct	12 ms	17024 KB	Output is correct
26	Correct	12 ms	17024 KB	Output is correct
27	Correct	13 ms	16896 KB	Output is correct
28	Correct	13 ms	17024 KB	Output is correct
29	Correct	12 ms	17024 KB	Output is correct
30	Correct	12 ms	17008 KB	Output is correct
31	Correct	12 ms	17024 KB	Output is correct
32	Correct	13 ms	17024 KB	Output is correct
33	Correct	13 ms	17024 KB	Output is correct
34	Correct	12 ms	16896 KB	Output is correct
35	Correct	12 ms	16896 KB	Output is correct
36	Correct	12 ms	16896 KB	Output is correct
37	Correct	12 ms	16896 KB	Output is correct
38	Correct	13 ms	17024 KB	Output is correct

Subtask #3
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	12 ms	16768 KB	Output is correct
2	Correct	11 ms	16768 KB	Output is correct
3	Correct	11 ms	16768 KB	Output is correct
4	Correct	11 ms	16768 KB	Output is correct
5	Correct	11 ms	16768 KB	Output is correct
6	Correct	11 ms	16768 KB	Output is correct
7	Correct	12 ms	16768 KB	Output is correct
8	Correct	12 ms	16768 KB	Output is correct
9	Correct	12 ms	16768 KB	Output is correct
10	Correct	11 ms	16768 KB	Output is correct
11	Correct	11 ms	16768 KB	Output is correct
12	Correct	11 ms	16768 KB	Output is correct
13	Correct	12 ms	16768 KB	Output is correct
14	Correct	11 ms	16768 KB	Output is correct
15	Correct	11 ms	16768 KB	Output is correct
16	Correct	11 ms	16768 KB	Output is correct
17	Correct	11 ms	16896 KB	Output is correct
18	Correct	12 ms	16768 KB	Output is correct
19	Correct	146 ms	30968 KB	Output is correct
20	Correct	134 ms	30972 KB	Output is correct
21	Correct	139 ms	30964 KB	Output is correct
22	Correct	141 ms	31224 KB	Output is correct
23	Correct	166 ms	40696 KB	Output is correct
24	Correct	145 ms	36312 KB	Output is correct
25	Correct	97 ms	29304 KB	Output is correct
26	Correct	65 ms	34808 KB	Output is correct
27	Correct	246 ms	39800 KB	Output is correct
28	Correct	299 ms	60992 KB	Output is correct
29	Correct	301 ms	59840 KB	Output is correct
30	Correct	238 ms	39800 KB	Output is correct
31	Correct	240 ms	39800 KB	Output is correct
32	Correct	311 ms	39800 KB	Output is correct
33	Correct	227 ms	36728 KB	Output is correct
34	Correct	375 ms	58048 KB	Output is correct

Subtask #4
57.0 / 57.0

#	결과	실행 시간	메모리	Grader output
1	Correct	12 ms	16768 KB	Output is correct
2	Correct	11 ms	16768 KB	Output is correct
3	Correct	11 ms	16768 KB	Output is correct
4	Correct	11 ms	16768 KB	Output is correct
5	Correct	11 ms	16768 KB	Output is correct
6	Correct	11 ms	16768 KB	Output is correct
7	Correct	12 ms	16768 KB	Output is correct
8	Correct	12 ms	16768 KB	Output is correct
9	Correct	12 ms	16768 KB	Output is correct
10	Correct	11 ms	16768 KB	Output is correct
11	Correct	11 ms	16768 KB	Output is correct
12	Correct	11 ms	16768 KB	Output is correct
13	Correct	12 ms	16768 KB	Output is correct
14	Correct	11 ms	16768 KB	Output is correct
15	Correct	11 ms	16768 KB	Output is correct
16	Correct	11 ms	16768 KB	Output is correct
17	Correct	11 ms	16896 KB	Output is correct
18	Correct	12 ms	16768 KB	Output is correct
19	Correct	11 ms	16768 KB	Output is correct
20	Correct	12 ms	16768 KB	Output is correct
21	Correct	13 ms	16896 KB	Output is correct
22	Correct	13 ms	17024 KB	Output is correct
23	Correct	12 ms	17024 KB	Output is correct
24	Correct	12 ms	17024 KB	Output is correct
25	Correct	12 ms	17024 KB	Output is correct
26	Correct	12 ms	17024 KB	Output is correct
27	Correct	13 ms	16896 KB	Output is correct
28	Correct	13 ms	17024 KB	Output is correct
29	Correct	12 ms	17024 KB	Output is correct
30	Correct	12 ms	17008 KB	Output is correct
31	Correct	12 ms	17024 KB	Output is correct
32	Correct	13 ms	17024 KB	Output is correct
33	Correct	13 ms	17024 KB	Output is correct
34	Correct	12 ms	16896 KB	Output is correct
35	Correct	12 ms	16896 KB	Output is correct
36	Correct	12 ms	16896 KB	Output is correct
37	Correct	12 ms	16896 KB	Output is correct
38	Correct	13 ms	17024 KB	Output is correct
39	Correct	146 ms	30968 KB	Output is correct
40	Correct	134 ms	30972 KB	Output is correct
41	Correct	139 ms	30964 KB	Output is correct
42	Correct	141 ms	31224 KB	Output is correct
43	Correct	166 ms	40696 KB	Output is correct
44	Correct	145 ms	36312 KB	Output is correct
45	Correct	97 ms	29304 KB	Output is correct
46	Correct	65 ms	34808 KB	Output is correct
47	Correct	246 ms	39800 KB	Output is correct
48	Correct	299 ms	60992 KB	Output is correct
49	Correct	301 ms	59840 KB	Output is correct
50	Correct	238 ms	39800 KB	Output is correct
51	Correct	240 ms	39800 KB	Output is correct
52	Correct	311 ms	39800 KB	Output is correct
53	Correct	227 ms	36728 KB	Output is correct
54	Correct	375 ms	58048 KB	Output is correct
55	Correct	24 ms	18944 KB	Output is correct
56	Correct	20 ms	18048 KB	Output is correct
57	Correct	92 ms	30328 KB	Output is correct
58	Correct	74 ms	29292 KB	Output is correct
59	Correct	78 ms	38940 KB	Output is correct
60	Correct	268 ms	60220 KB	Output is correct
61	Correct	260 ms	41848 KB	Output is correct
62	Correct	246 ms	39672 KB	Output is correct
63	Correct	310 ms	39800 KB	Output is correct
64	Correct	487 ms	73116 KB	Output is correct
65	Correct	512 ms	73668 KB	Output is correct
66	Correct	308 ms	57024 KB	Output is correct
67	Correct	251 ms	41700 KB	Output is correct
68	Correct	385 ms	53056 KB	Output is correct
69	Correct	391 ms	53436 KB	Output is correct
70	Correct	368 ms	51644 KB	Output is correct

답안 #302333

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