oj.uz

답안 #990587

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
990587 2024-05-30T16:45:34 Z ivaziva 경주 (Race) (IOI11_race) C++14
100 / 100
 539 ms 42928 KB 
#include "race.h"
#include <bits/stdc++.h>

using namespace std;

#define MAXN 200010

int n,k;
vector<pair<int,int>> adj[MAXN];
int siz[MAXN];
bool uklonjeno[MAXN];
map<int,int> mapa;
int ans=INT_MAX;

int subtree_size(int node,int pret)
{
  siz[node]=1;
  int s=adj[node].size();
  for (int i=0;i<s;i++)
  {
    int sled=adj[node][i].first;
    if (sled==pret) continue;
    if (uklonjeno[sled]==true) continue;
    siz[node]+=subtree_size(sled,node);
  }
  return siz[node];
}

int get_centroid(int node,int pret,int velicina)
{
  int s=adj[node].size();
  for (int i=0;i<s;i++)
  {
    int sled=adj[node][i].first;
    if (sled==pret) continue;
    if (uklonjeno[sled]==true) continue;
    if (siz[sled]*2>velicina) return get_centroid(sled,node,velicina);
  }
  return node;
}

void racunamo(int node,int pret,bool stanje,int dubina,int depth)
{
  if (dubina>k) return;
  if (stanje==false)
  {
    int val=k-dubina;
    if (mapa.find(val)!=mapa.end()) ans=min(ans,depth+mapa[val]);
  }
  else
  {
    if (mapa.find(dubina)==mapa.end()) mapa[dubina]=depth;
    else mapa[dubina]=min(mapa[dubina],depth);
  }
  int s=adj[node].size();
  for (int i=0;i<s;i++)
  {
    int sled=adj[node][i].first;
    int tezina=adj[node][i].second;
    if (sled==pret) continue;
    if (uklonjeno[sled]==true) continue;
    racunamo(sled,node,stanje,dubina+tezina,depth+1);
  }
}

void centroid_decomposition(int node)
{
  subtree_size(node,-1);
  int centroida=get_centroid(node,-1,siz[node]);
  uklonjeno[centroida]=true;
  int s=adj[centroida].size();
  for (int i=0;i<s;i++)
  {
    int sled=adj[centroida][i].first;
    int tezina=adj[centroida][i].second;
    if (uklonjeno[sled]==true) continue;
    racunamo(sled,centroida,false,tezina,1);
    racunamo(sled,centroida,true,tezina,1);
  }
  if (mapa.find(k)!=mapa.end()) ans=min(ans,mapa[k]);
  mapa.clear();
  for (int i=0;i<s;i++)
  {
    int sled=adj[centroida][i].first;
    if (uklonjeno[sled]==true) continue;
    centroid_decomposition(sled);
  }
}

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 a=H[i][0],b=H[i][1];
    int len=L[i];
    adj[a].push_back({b,len});
    adj[b].push_back({a,len});
  }
  centroid_decomposition(0);
  if (ans==INT_MAX) return -1;
  else return ans;
};

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9560 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 1 ms 9564 KB Output is correct
4 Correct 2 ms 9560 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 1 ms 9564 KB Output is correct
7 Correct 1 ms 9564 KB Output is correct
8 Correct 2 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9560 KB Output is correct
11 Correct 2 ms 9564 KB Output is correct
12 Correct 2 ms 9584 KB Output is correct
13 Correct 2 ms 9564 KB Output is correct
14 Correct 2 ms 9600 KB Output is correct
15 Correct 2 ms 9564 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 2 ms 9564 KB Output is correct
18 Correct 2 ms 9560 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9560 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 1 ms 9564 KB Output is correct
4 Correct 2 ms 9560 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 1 ms 9564 KB Output is correct
7 Correct 1 ms 9564 KB Output is correct
8 Correct 2 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9560 KB Output is correct
11 Correct 2 ms 9564 KB Output is correct
12 Correct 2 ms 9584 KB Output is correct
13 Correct 2 ms 9564 KB Output is correct
14 Correct 2 ms 9600 KB Output is correct
15 Correct 2 ms 9564 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 2 ms 9564 KB Output is correct
18 Correct 2 ms 9560 KB Output is correct
19 Correct 2 ms 9564 KB Output is correct
20 Correct 2 ms 9564 KB Output is correct
21 Correct 3 ms 9564 KB Output is correct
22 Correct 3 ms 9564 KB Output is correct
23 Correct 2 ms 9564 KB Output is correct
24 Correct 2 ms 9564 KB Output is correct
25 Correct 3 ms 9820 KB Output is correct
26 Correct 3 ms 9564 KB Output is correct
27 Correct 2 ms 9564 KB Output is correct
28 Correct 3 ms 9820 KB Output is correct
29 Correct 3 ms 9820 KB Output is correct
30 Correct 2 ms 9820 KB Output is correct
31 Correct 3 ms 9820 KB Output is correct
32 Correct 3 ms 9820 KB Output is correct
33 Correct 4 ms 9820 KB Output is correct
34 Correct 2 ms 9564 KB Output is correct
35 Correct 2 ms 9820 KB Output is correct
36 Correct 2 ms 9820 KB Output is correct
37 Correct 2 ms 9764 KB Output is correct
38 Correct 3 ms 9820 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9560 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 1 ms 9564 KB Output is correct
4 Correct 2 ms 9560 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 1 ms 9564 KB Output is correct
7 Correct 1 ms 9564 KB Output is correct
8 Correct 2 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9560 KB Output is correct
11 Correct 2 ms 9564 KB Output is correct
12 Correct 2 ms 9584 KB Output is correct
13 Correct 2 ms 9564 KB Output is correct
14 Correct 2 ms 9600 KB Output is correct
15 Correct 2 ms 9564 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 2 ms 9564 KB Output is correct
18 Correct 2 ms 9560 KB Output is correct
19 Correct 121 ms 15696 KB Output is correct
20 Correct 116 ms 16212 KB Output is correct
21 Correct 124 ms 15960 KB Output is correct
22 Correct 123 ms 16728 KB Output is correct
23 Correct 50 ms 16732 KB Output is correct
24 Correct 43 ms 16732 KB Output is correct
25 Correct 93 ms 19796 KB Output is correct
26 Correct 69 ms 23388 KB Output is correct
27 Correct 110 ms 20448 KB Output is correct
28 Correct 143 ms 34988 KB Output is correct
29 Correct 143 ms 33888 KB Output is correct
30 Correct 106 ms 20816 KB Output is correct
31 Correct 106 ms 20820 KB Output is correct
32 Correct 111 ms 20668 KB Output is correct
33 Correct 142 ms 19792 KB Output is correct
34 Correct 97 ms 19796 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9560 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 1 ms 9564 KB Output is correct
4 Correct 2 ms 9560 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 1 ms 9564 KB Output is correct
7 Correct 1 ms 9564 KB Output is correct
8 Correct 2 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9560 KB Output is correct
11 Correct 2 ms 9564 KB Output is correct
12 Correct 2 ms 9584 KB Output is correct
13 Correct 2 ms 9564 KB Output is correct
14 Correct 2 ms 9600 KB Output is correct
15 Correct 2 ms 9564 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 2 ms 9564 KB Output is correct
18 Correct 2 ms 9560 KB Output is correct
19 Correct 2 ms 9564 KB Output is correct
20 Correct 2 ms 9564 KB Output is correct
21 Correct 3 ms 9564 KB Output is correct
22 Correct 3 ms 9564 KB Output is correct
23 Correct 2 ms 9564 KB Output is correct
24 Correct 2 ms 9564 KB Output is correct
25 Correct 3 ms 9820 KB Output is correct
26 Correct 3 ms 9564 KB Output is correct
27 Correct 2 ms 9564 KB Output is correct
28 Correct 3 ms 9820 KB Output is correct
29 Correct 3 ms 9820 KB Output is correct
30 Correct 2 ms 9820 KB Output is correct
31 Correct 3 ms 9820 KB Output is correct
32 Correct 3 ms 9820 KB Output is correct
33 Correct 4 ms 9820 KB Output is correct
34 Correct 2 ms 9564 KB Output is correct
35 Correct 2 ms 9820 KB Output is correct
36 Correct 2 ms 9820 KB Output is correct
37 Correct 2 ms 9764 KB Output is correct
38 Correct 3 ms 9820 KB Output is correct
39 Correct 121 ms 15696 KB Output is correct
40 Correct 116 ms 16212 KB Output is correct
41 Correct 124 ms 15960 KB Output is correct
42 Correct 123 ms 16728 KB Output is correct
43 Correct 50 ms 16732 KB Output is correct
44 Correct 43 ms 16732 KB Output is correct
45 Correct 93 ms 19796 KB Output is correct
46 Correct 69 ms 23388 KB Output is correct
47 Correct 110 ms 20448 KB Output is correct
48 Correct 143 ms 34988 KB Output is correct
49 Correct 143 ms 33888 KB Output is correct
50 Correct 106 ms 20816 KB Output is correct
51 Correct 106 ms 20820 KB Output is correct
52 Correct 111 ms 20668 KB Output is correct
53 Correct 142 ms 19792 KB Output is correct
54 Correct 97 ms 19796 KB Output is correct
55 Correct 13 ms 10332 KB Output is correct
56 Correct 10 ms 10076 KB Output is correct
57 Correct 85 ms 16068 KB Output is correct
58 Correct 35 ms 16452 KB Output is correct
59 Correct 200 ms 26964 KB Output is correct
60 Correct 494 ms 42928 KB Output is correct
61 Correct 157 ms 20532 KB Output is correct
62 Correct 178 ms 20820 KB Output is correct
63 Correct 191 ms 20804 KB Output is correct
64 Correct 539 ms 24404 KB Output is correct
65 Correct 92 ms 21076 KB Output is correct
66 Correct 339 ms 30284 KB Output is correct
67 Correct 65 ms 21696 KB Output is correct
68 Correct 219 ms 24916 KB Output is correct
69 Correct 234 ms 23636 KB Output is correct
70 Correct 216 ms 24400 KB Output is correct