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답안 #944312

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
944312 2024-03-12T14:30:10 Z THXuan 경주 (Race) (IOI11_race) C++14
100 / 100
 286 ms 57936 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <cstring>
#include <queue>
#include <set>
#include <map>
#define INF 1e9
using namespace std;
typedef long long ll;
 
const int MAX = 1e6 + 5;
int n, k, ans = INF, dp[MAX];
vector<int>cnt(MAX, INF);
bool visited[MAX];
vector<int>v;
vector<pair<int, int>>adj[MAX];
 
int get_size(int s, int e) {
	dp[s] = 1;
	for (auto u : adj[s]) {
		if (u.first == e || visited[u.first]) continue;
		get_size(u.first, s);
		dp[s] += dp[u.first];
	}
	return dp[s];
}
 
int get_centroid(int s, int e, int n) {
	for (auto u : adj[s]) {
		if (u.first == e || visited[u.first])continue;
		if (dp[u.first] * 2 > n) return get_centroid(u.first, s, n);
	}
	return s;
}
 
void dfs(int s, int e, bool flag, int sum, int dep) {
	if (sum > k)return;
	if (!flag) {
		ll need = k - sum;
		if (cnt[need] != 1e9) {
			ans = min(ans, dep + cnt[need]);
		}
	}
	else {
		cnt[sum] = min(cnt[sum], dep);
		v.push_back(sum);
	}
	for (auto u : adj[s]) {
		if (u.first == e || visited[u.first])continue;
		dfs(u.first, s, flag, sum + u.second, dep + 1);
	}
}
 
void centroid_decomposition(int node) {
	int centroid = get_centroid(node, -1, get_size(node, -1));
	visited[centroid] = true;
	cnt[0] = 0;
	for (pair<int, int> u : adj[centroid]) {
		if (!visited[u.first]) {
			dfs(u.first, centroid, false, u.second, 1);
			dfs(u.first, centroid, true, u.second, 1);
		}
	}
	for (auto u : v) cnt[u] = INF;
	v.clear();
	for (auto u : adj[centroid]) {
		if (!visited[u.first])centroid_decomposition(u.first);
	}
}
 
int best_path(int N, int K, int H[][2], int L[]) {
	n = N; k = K;
	for (int i = 0; i < n - 1; i++) {
		int u = H[i][0], v = H[i][1], w = L[i];
		adj[u].push_back({ v, w });
		adj[v].push_back({ u, w });
	}
	centroid_decomposition(1);
	if (ans >= 1e9) return -1;
	else return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 32860 KB Output is correct
2 Correct 7 ms 32860 KB Output is correct
3 Correct 7 ms 32860 KB Output is correct
4 Correct 7 ms 32860 KB Output is correct
5 Correct 7 ms 32856 KB Output is correct
6 Correct 7 ms 33040 KB Output is correct
7 Correct 7 ms 32856 KB Output is correct
8 Correct 7 ms 32860 KB Output is correct
9 Correct 7 ms 33072 KB Output is correct
10 Correct 7 ms 32856 KB Output is correct
11 Correct 7 ms 32856 KB Output is correct
12 Correct 7 ms 32856 KB Output is correct
13 Correct 7 ms 32856 KB Output is correct
14 Correct 7 ms 32860 KB Output is correct
15 Correct 7 ms 32860 KB Output is correct
16 Correct 7 ms 32856 KB Output is correct
17 Correct 7 ms 32860 KB Output is correct
18 Correct 9 ms 33076 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 32860 KB Output is correct
2 Correct 7 ms 32860 KB Output is correct
3 Correct 7 ms 32860 KB Output is correct
4 Correct 7 ms 32860 KB Output is correct
5 Correct 7 ms 32856 KB Output is correct
6 Correct 7 ms 33040 KB Output is correct
7 Correct 7 ms 32856 KB Output is correct
8 Correct 7 ms 32860 KB Output is correct
9 Correct 7 ms 33072 KB Output is correct
10 Correct 7 ms 32856 KB Output is correct
11 Correct 7 ms 32856 KB Output is correct
12 Correct 7 ms 32856 KB Output is correct
13 Correct 7 ms 32856 KB Output is correct
14 Correct 7 ms 32860 KB Output is correct
15 Correct 7 ms 32860 KB Output is correct
16 Correct 7 ms 32856 KB Output is correct
17 Correct 7 ms 32860 KB Output is correct
18 Correct 9 ms 33076 KB Output is correct
19 Correct 7 ms 32860 KB Output is correct
20 Correct 7 ms 32860 KB Output is correct
21 Correct 7 ms 33116 KB Output is correct
22 Correct 8 ms 33076 KB Output is correct
23 Correct 7 ms 33112 KB Output is correct
24 Correct 8 ms 33116 KB Output is correct
25 Correct 8 ms 33112 KB Output is correct
26 Correct 7 ms 33112 KB Output is correct
27 Correct 8 ms 33116 KB Output is correct
28 Correct 7 ms 33116 KB Output is correct
29 Correct 8 ms 33112 KB Output is correct
30 Correct 9 ms 33116 KB Output is correct
31 Correct 8 ms 33112 KB Output is correct
32 Correct 10 ms 33112 KB Output is correct
33 Correct 8 ms 33116 KB Output is correct
34 Correct 8 ms 33116 KB Output is correct
35 Correct 9 ms 33036 KB Output is correct
36 Correct 8 ms 33116 KB Output is correct
37 Correct 8 ms 33116 KB Output is correct
38 Correct 8 ms 33116 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 32860 KB Output is correct
2 Correct 7 ms 32860 KB Output is correct
3 Correct 7 ms 32860 KB Output is correct
4 Correct 7 ms 32860 KB Output is correct
5 Correct 7 ms 32856 KB Output is correct
6 Correct 7 ms 33040 KB Output is correct
7 Correct 7 ms 32856 KB Output is correct
8 Correct 7 ms 32860 KB Output is correct
9 Correct 7 ms 33072 KB Output is correct
10 Correct 7 ms 32856 KB Output is correct
11 Correct 7 ms 32856 KB Output is correct
12 Correct 7 ms 32856 KB Output is correct
13 Correct 7 ms 32856 KB Output is correct
14 Correct 7 ms 32860 KB Output is correct
15 Correct 7 ms 32860 KB Output is correct
16 Correct 7 ms 32856 KB Output is correct
17 Correct 7 ms 32860 KB Output is correct
18 Correct 9 ms 33076 KB Output is correct
19 Correct 82 ms 39004 KB Output is correct
20 Correct 83 ms 38796 KB Output is correct
21 Correct 96 ms 39412 KB Output is correct
22 Correct 81 ms 39628 KB Output is correct
23 Correct 59 ms 39000 KB Output is correct
24 Correct 45 ms 39004 KB Output is correct
25 Correct 91 ms 45396 KB Output is correct
26 Correct 74 ms 46708 KB Output is correct
27 Correct 113 ms 44884 KB Output is correct
28 Correct 201 ms 57936 KB Output is correct
29 Correct 155 ms 52704 KB Output is correct
30 Correct 109 ms 44884 KB Output is correct
31 Correct 107 ms 44772 KB Output is correct
32 Correct 127 ms 44936 KB Output is correct
33 Correct 130 ms 43548 KB Output is correct
34 Correct 113 ms 43604 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 32860 KB Output is correct
2 Correct 7 ms 32860 KB Output is correct
3 Correct 7 ms 32860 KB Output is correct
4 Correct 7 ms 32860 KB Output is correct
5 Correct 7 ms 32856 KB Output is correct
6 Correct 7 ms 33040 KB Output is correct
7 Correct 7 ms 32856 KB Output is correct
8 Correct 7 ms 32860 KB Output is correct
9 Correct 7 ms 33072 KB Output is correct
10 Correct 7 ms 32856 KB Output is correct
11 Correct 7 ms 32856 KB Output is correct
12 Correct 7 ms 32856 KB Output is correct
13 Correct 7 ms 32856 KB Output is correct
14 Correct 7 ms 32860 KB Output is correct
15 Correct 7 ms 32860 KB Output is correct
16 Correct 7 ms 32856 KB Output is correct
17 Correct 7 ms 32860 KB Output is correct
18 Correct 9 ms 33076 KB Output is correct
19 Correct 7 ms 32860 KB Output is correct
20 Correct 7 ms 32860 KB Output is correct
21 Correct 7 ms 33116 KB Output is correct
22 Correct 8 ms 33076 KB Output is correct
23 Correct 7 ms 33112 KB Output is correct
24 Correct 8 ms 33116 KB Output is correct
25 Correct 8 ms 33112 KB Output is correct
26 Correct 7 ms 33112 KB Output is correct
27 Correct 8 ms 33116 KB Output is correct
28 Correct 7 ms 33116 KB Output is correct
29 Correct 8 ms 33112 KB Output is correct
30 Correct 9 ms 33116 KB Output is correct
31 Correct 8 ms 33112 KB Output is correct
32 Correct 10 ms 33112 KB Output is correct
33 Correct 8 ms 33116 KB Output is correct
34 Correct 8 ms 33116 KB Output is correct
35 Correct 9 ms 33036 KB Output is correct
36 Correct 8 ms 33116 KB Output is correct
37 Correct 8 ms 33116 KB Output is correct
38 Correct 8 ms 33116 KB Output is correct
39 Correct 82 ms 39004 KB Output is correct
40 Correct 83 ms 38796 KB Output is correct
41 Correct 96 ms 39412 KB Output is correct
42 Correct 81 ms 39628 KB Output is correct
43 Correct 59 ms 39000 KB Output is correct
44 Correct 45 ms 39004 KB Output is correct
45 Correct 91 ms 45396 KB Output is correct
46 Correct 74 ms 46708 KB Output is correct
47 Correct 113 ms 44884 KB Output is correct
48 Correct 201 ms 57936 KB Output is correct
49 Correct 155 ms 52704 KB Output is correct
50 Correct 109 ms 44884 KB Output is correct
51 Correct 107 ms 44772 KB Output is correct
52 Correct 127 ms 44936 KB Output is correct
53 Correct 130 ms 43548 KB Output is correct
54 Correct 113 ms 43604 KB Output is correct
55 Correct 13 ms 33628 KB Output is correct
56 Correct 14 ms 33368 KB Output is correct
57 Correct 57 ms 39892 KB Output is correct
58 Correct 34 ms 41052 KB Output is correct
59 Correct 74 ms 47576 KB Output is correct
60 Correct 286 ms 54744 KB Output is correct
61 Correct 123 ms 46676 KB Output is correct
62 Correct 122 ms 48060 KB Output is correct
63 Correct 148 ms 47996 KB Output is correct
64 Correct 264 ms 46652 KB Output is correct
65 Correct 144 ms 47956 KB Output is correct
66 Correct 238 ms 56956 KB Output is correct
67 Correct 80 ms 50320 KB Output is correct
68 Correct 155 ms 48080 KB Output is correct
69 Correct 150 ms 45832 KB Output is correct
70 Correct 141 ms 47916 KB Output is correct