oj.uz

답안 #1087322

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1087322 2024-09-12T13:33:36 Z quangminh412 경주 (Race) (IOI11_race) C++14
43 / 100
 3000 ms 30028 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);
	}
}
 
void update(int u, int p, int w, int h)
{
	if (w > k) return;
	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;
	
	for (int i = 1; i <= k; i++) cnt[i] = oo;
	
	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 (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 3 ms 4952 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 5048 KB Output is correct
4 Correct 2 ms 5064 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 4952 KB Output is correct
8 Correct 2 ms 4956 KB Output is correct
9 Correct 2 ms 4964 KB Output is correct
10 Correct 2 ms 4952 KB Output is correct
11 Correct 4 ms 4956 KB Output is correct
12 Correct 4 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 3 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 3 ms 4956 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4952 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 5048 KB Output is correct
4 Correct 2 ms 5064 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 4952 KB Output is correct
8 Correct 2 ms 4956 KB Output is correct
9 Correct 2 ms 4964 KB Output is correct
10 Correct 2 ms 4952 KB Output is correct
11 Correct 4 ms 4956 KB Output is correct
12 Correct 4 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 3 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 3 ms 4956 KB Output is correct
19 Correct 2 ms 4952 KB Output is correct
20 Correct 3 ms 4956 KB Output is correct
21 Correct 3 ms 5208 KB Output is correct
22 Correct 393 ms 8844 KB Output is correct
23 Correct 261 ms 8028 KB Output is correct
24 Correct 368 ms 8788 KB Output is correct
25 Correct 314 ms 8540 KB Output is correct
26 Correct 124 ms 6488 KB Output is correct
27 Correct 329 ms 8532 KB Output is correct
28 Correct 71 ms 5980 KB Output is correct
29 Correct 149 ms 6488 KB Output is correct
30 Correct 137 ms 6736 KB Output is correct
31 Correct 232 ms 7784 KB Output is correct
32 Correct 267 ms 7976 KB Output is correct
33 Correct 297 ms 8284 KB Output is correct
34 Correct 189 ms 7512 KB Output is correct
35 Correct 262 ms 8408 KB Output is correct
36 Correct 270 ms 8868 KB Output is correct
37 Correct 249 ms 8280 KB Output is correct
38 Correct 167 ms 7004 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4952 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 5048 KB Output is correct
4 Correct 2 ms 5064 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 4952 KB Output is correct
8 Correct 2 ms 4956 KB Output is correct
9 Correct 2 ms 4964 KB Output is correct
10 Correct 2 ms 4952 KB Output is correct
11 Correct 4 ms 4956 KB Output is correct
12 Correct 4 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 3 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 3 ms 4956 KB Output is correct
19 Correct 76 ms 12116 KB Output is correct
20 Correct 75 ms 12092 KB Output is correct
21 Correct 81 ms 12008 KB Output is correct
22 Correct 76 ms 12104 KB Output is correct
23 Correct 55 ms 12368 KB Output is correct
24 Correct 35 ms 12112 KB Output is correct
25 Correct 92 ms 17232 KB Output is correct
26 Correct 60 ms 17748 KB Output is correct
27 Correct 91 ms 19428 KB Output is correct
28 Correct 174 ms 30028 KB Output is correct
29 Correct 146 ms 25680 KB Output is correct
30 Correct 97 ms 19284 KB Output is correct
31 Correct 92 ms 19332 KB Output is correct
32 Correct 127 ms 19604 KB Output is correct
33 Correct 138 ms 18244 KB Output is correct
34 Correct 120 ms 19056 KB Output is correct

Subtask #4
0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4952 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 5048 KB Output is correct
4 Correct 2 ms 5064 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 4952 KB Output is correct
8 Correct 2 ms 4956 KB Output is correct
9 Correct 2 ms 4964 KB Output is correct
10 Correct 2 ms 4952 KB Output is correct
11 Correct 4 ms 4956 KB Output is correct
12 Correct 4 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 3 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 3 ms 4956 KB Output is correct
19 Correct 2 ms 4952 KB Output is correct
20 Correct 3 ms 4956 KB Output is correct
21 Correct 3 ms 5208 KB Output is correct
22 Correct 393 ms 8844 KB Output is correct
23 Correct 261 ms 8028 KB Output is correct
24 Correct 368 ms 8788 KB Output is correct
25 Correct 314 ms 8540 KB Output is correct
26 Correct 124 ms 6488 KB Output is correct
27 Correct 329 ms 8532 KB Output is correct
28 Correct 71 ms 5980 KB Output is correct
29 Correct 149 ms 6488 KB Output is correct
30 Correct 137 ms 6736 KB Output is correct
31 Correct 232 ms 7784 KB Output is correct
32 Correct 267 ms 7976 KB Output is correct
33 Correct 297 ms 8284 KB Output is correct
34 Correct 189 ms 7512 KB Output is correct
35 Correct 262 ms 8408 KB Output is correct
36 Correct 270 ms 8868 KB Output is correct
37 Correct 249 ms 8280 KB Output is correct
38 Correct 167 ms 7004 KB Output is correct
39 Correct 76 ms 12116 KB Output is correct
40 Correct 75 ms 12092 KB Output is correct
41 Correct 81 ms 12008 KB Output is correct
42 Correct 76 ms 12104 KB Output is correct
43 Correct 55 ms 12368 KB Output is correct
44 Correct 35 ms 12112 KB Output is correct
45 Correct 92 ms 17232 KB Output is correct
46 Correct 60 ms 17748 KB Output is correct
47 Correct 91 ms 19428 KB Output is correct
48 Correct 174 ms 30028 KB Output is correct
49 Correct 146 ms 25680 KB Output is correct
50 Correct 97 ms 19284 KB Output is correct
51 Correct 92 ms 19332 KB Output is correct
52 Correct 127 ms 19604 KB Output is correct
53 Correct 138 ms 18244 KB Output is correct
54 Correct 120 ms 19056 KB Output is correct
55 Correct 23 ms 5724 KB Output is correct
56 Correct 8 ms 5724 KB Output is correct
57 Correct 44 ms 12120 KB Output is correct
58 Correct 26 ms 11984 KB Output is correct
59 Execution timed out 3068 ms 18508 KB Time limit exceeded
60 Halted 0 ms 0 KB -