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답안 #1087331

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1087331 2024-09-12T13:38:18 Z quangminh412 경주 (Race) (IOI11_race) C++14
100 / 100
 743 ms 33000 KB 
#include <bits/stdc++.h>
using namespace std;
 
/*
  John Watson
  https://codeforces.com/profile/quangminh98
 
  Mua Code nhu mua Florentino !!
*/
 
#define faster() ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define ll long long
 
const int oo = 1e9;
const int maxn = 2e5 + 9;
 
vector<pair<int, int>> adj[maxn];
int del[maxn], sz[maxn], h[maxn];
vector<int> cnt;
int n, k, res = oo;
 
int subtree(int u, int p = -1)
{
  sz[u] = 1;
  for (pair<int, int> nxt : adj[u])
  {
    int v = nxt.first;
    if (v == p || del[v]) continue;
    
    sz[u] += subtree(v, u);
  }
  return sz[u];
}
 
int find_centroid(int u, int p, int N)
{
  for (pair<int, int> nxt : adj[u])
  {
    int v = nxt.first;
    if (v == p || del[v]) continue;
    
    if (sz[v] > N / 2)
      return find_centroid(v, u, N);
  }
  return u;
}
 
void count(int u, int p, int w, int h)
{
	if (w > k) return;
	if (cnt[k - w] != oo)
		res = min(res, cnt[k - w] + h);
		
	for (pair<int, int> nxt : adj[u])
	{
		int v = nxt.first;
		if (del[v] || v == p) continue;
		
		count(v, u, w + nxt.second, h + 1);
	}
}
 
int mx_w = 0;
void update(int u, int p, int w, int h)
{
	if (w > k) return;
	mx_w = max(mx_w, w);
	cnt[w] = min(cnt[w], h);
	
	for (pair<int, int> nxt : adj[u])
	{
		int v = nxt.first;
		if (del[v] || v == p) continue;
		
		update(v, u, w + nxt.second, h + 1);
	}
}
 
void centroid_decomposition(int u)
{
	int centroid = find_centroid(u, -1, subtree(u));
	del[centroid] = 1;
	
	mx_w = 0;
	
	for (pair<int, int> nxt : adj[centroid])
	{
		int v = nxt.first;
		if (del[v]) continue;
		
		count(v, centroid, nxt.second, 1);
		update(v, centroid, nxt.second, 1);
	}
	
	for (int i = 1; i <= mx_w; i++) cnt[i] = oo;
	
	for (pair<int, int> nxt : adj[centroid])
	{
		int v = nxt.first;
		if (del[v]) continue;
		
		centroid_decomposition(v);
	}
}
 
int best_path(int _n, int _k, int H[][2], int l[]) 
{
	n = _n;
	k = _k;
	cnt.resize(k + 5, oo);
	cnt[0] = 0;
	for (int i = 0; i < n - 1; i++)
	{
	  int w = l[i];
	  int u = H[i][0], v = H[i][1];
	  adj[u].push_back({v, w});
	  adj[v].push_back({u, w});
	}
	
	centroid_decomposition(1);
	
	return (res == oo ? -1 : res);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 2 ms 4956 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 4952 KB Output is correct
11 Correct 3 ms 5120 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4972 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 2 ms 4956 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 2 ms 4956 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 4952 KB Output is correct
11 Correct 3 ms 5120 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4972 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 2 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4956 KB Output is correct
21 Correct 2 ms 5212 KB Output is correct
22 Correct 113 ms 8840 KB Output is correct
23 Correct 93 ms 7972 KB Output is correct
24 Correct 97 ms 8604 KB Output is correct
25 Correct 17 ms 8284 KB Output is correct
26 Correct 37 ms 6492 KB Output is correct
27 Correct 4 ms 8284 KB Output is correct
28 Correct 14 ms 6020 KB Output is correct
29 Correct 15 ms 6492 KB Output is correct
30 Correct 15 ms 6488 KB Output is correct
31 Correct 19 ms 7768 KB Output is correct
32 Correct 16 ms 8020 KB Output is correct
33 Correct 19 ms 8308 KB Output is correct
34 Correct 23 ms 7560 KB Output is correct
35 Correct 29 ms 8284 KB Output is correct
36 Correct 24 ms 8792 KB Output is correct
37 Correct 7 ms 8284 KB Output is correct
38 Correct 6 ms 7004 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 2 ms 4956 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 4952 KB Output is correct
11 Correct 3 ms 5120 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4972 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 2 ms 4956 KB Output is correct
19 Correct 72 ms 11996 KB Output is correct
20 Correct 71 ms 12112 KB Output is correct
21 Correct 76 ms 11996 KB Output is correct
22 Correct 68 ms 12112 KB Output is correct
23 Correct 79 ms 12368 KB Output is correct
24 Correct 33 ms 12112 KB Output is correct
25 Correct 90 ms 17216 KB Output is correct
26 Correct 64 ms 17744 KB Output is correct
27 Correct 118 ms 19432 KB Output is correct
28 Correct 182 ms 29960 KB Output is correct
29 Correct 165 ms 25628 KB Output is correct
30 Correct 111 ms 19496 KB Output is correct
31 Correct 111 ms 19260 KB Output is correct
32 Correct 107 ms 19512 KB Output is correct
33 Correct 131 ms 18308 KB Output is correct
34 Correct 115 ms 19116 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 2 ms 4956 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 4952 KB Output is correct
11 Correct 3 ms 5120 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4972 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 2 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4956 KB Output is correct
21 Correct 2 ms 5212 KB Output is correct
22 Correct 113 ms 8840 KB Output is correct
23 Correct 93 ms 7972 KB Output is correct
24 Correct 97 ms 8604 KB Output is correct
25 Correct 17 ms 8284 KB Output is correct
26 Correct 37 ms 6492 KB Output is correct
27 Correct 4 ms 8284 KB Output is correct
28 Correct 14 ms 6020 KB Output is correct
29 Correct 15 ms 6492 KB Output is correct
30 Correct 15 ms 6488 KB Output is correct
31 Correct 19 ms 7768 KB Output is correct
32 Correct 16 ms 8020 KB Output is correct
33 Correct 19 ms 8308 KB Output is correct
34 Correct 23 ms 7560 KB Output is correct
35 Correct 29 ms 8284 KB Output is correct
36 Correct 24 ms 8792 KB Output is correct
37 Correct 7 ms 8284 KB Output is correct
38 Correct 6 ms 7004 KB Output is correct
39 Correct 72 ms 11996 KB Output is correct
40 Correct 71 ms 12112 KB Output is correct
41 Correct 76 ms 11996 KB Output is correct
42 Correct 68 ms 12112 KB Output is correct
43 Correct 79 ms 12368 KB Output is correct
44 Correct 33 ms 12112 KB Output is correct
45 Correct 90 ms 17216 KB Output is correct
46 Correct 64 ms 17744 KB Output is correct
47 Correct 118 ms 19432 KB Output is correct
48 Correct 182 ms 29960 KB Output is correct
49 Correct 165 ms 25628 KB Output is correct
50 Correct 111 ms 19496 KB Output is correct
51 Correct 111 ms 19260 KB Output is correct
52 Correct 107 ms 19512 KB Output is correct
53 Correct 131 ms 18308 KB Output is correct
54 Correct 115 ms 19116 KB Output is correct
55 Correct 10 ms 5724 KB Output is correct
56 Correct 10 ms 5844 KB Output is correct
57 Correct 45 ms 12324 KB Output is correct
58 Correct 34 ms 11976 KB Output is correct
59 Correct 62 ms 18540 KB Output is correct
60 Correct 271 ms 29844 KB Output is correct
61 Correct 152 ms 19540 KB Output is correct
62 Correct 129 ms 23484 KB Output is correct
63 Correct 149 ms 23328 KB Output is correct
64 Correct 743 ms 21588 KB Output is correct
65 Correct 144 ms 20276 KB Output is correct
66 Correct 524 ms 33000 KB Output is correct
67 Correct 65 ms 23924 KB Output is correct
68 Correct 276 ms 24080 KB Output is correct
69 Correct 294 ms 24332 KB Output is correct
70 Correct 264 ms 23380 KB Output is correct