oj.uz

답안 #849015

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
849015 2023-09-13T22:02:50 Z BidoTeima 경주 (Race) (IOI11_race) C++17
100 / 100
 613 ms 39472 KB 
//#pragma once
#include "race.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 2e5 + 3;
int k;
vector<pair<int,int>>adj[N];
bool marked[N];
int sub[N];
int sz;
int ans = 1e9;
int dfs_subtree(int node, int prev){
    sub[node] = 1;
    for(auto& edge : adj[node]){
        if(edge.first != prev && !marked[edge.first]){
            sub[node] += dfs_subtree(edge.first, node);
        }
    }
    return sub[node];
}
int find_centroid(int node, int prev){
    for(auto& edge : adj[node]){
        if(edge.first != prev && !marked[edge.first] && 2 * sub[edge.first] > sz){
            return find_centroid(edge.first, node);
        }
    }
    return node;
} 
map<int,int>mp{};
vector<pair<int,int>>vc;
void dfs( int node, int prev, int cur, int len){
  if(cur>k)return;
  vc.push_back({cur,len});
  auto it = mp.find(k - cur);
  if(it != mp.end()){
    ans = min(ans, it->second+len);
  } 
  for(auto & edge : adj[node]){
    if(edge.first != prev && !marked[edge.first]){
      dfs(edge.first, node, cur + edge.second, len + 1);
    }
  }
}
void decompose(int node){
  dfs_subtree(node, -1);
  sz = sub[node];
  int c = find_centroid(node, -1);
  mp[0]=0;
  for(auto&edge:adj[c]){
    int child = edge.first;
    if(!marked[child]){
      vc.clear();
      dfs(child, c, edge.second, 1);
      for(auto&p:vc){
        auto it = mp.find(p.first);
        if(it==mp.end()){
          mp[p.first]=p.second;
        }else{
          it->second=min(it->second, p.second);
        }
      }
    }
  }
  marked[c] = 1;
  mp.clear();
  for(auto&edge:adj[c]){
    if(!marked[edge.first])decompose(edge.first);
  }
}
int best_path(int N, int K, int H[][2], int L[])
{
  k=K;
  for(int i = 0; i < N - 1; i++){
    adj[H[i][0]].push_back({H[i][1],L[i]});
    adj[H[i][1]].push_back({H[i][0],L[i]});
  }
  decompose(0);
  if(ans == 1e9) return -1;
  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 2 ms 9648 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 2 ms 9564 KB Output is correct
7 Correct 2 ms 9716 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 9564 KB Output is correct
11 Correct 2 ms 9740 KB Output is correct
12 Correct 2 ms 9716 KB Output is correct
13 Correct 2 ms 9564 KB Output is correct
14 Correct 2 ms 9564 KB Output is correct
15 Correct 2 ms 9560 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 2 ms 9560 KB Output is correct
18 Correct 2 ms 9564 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 2 ms 9648 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 2 ms 9564 KB Output is correct
7 Correct 2 ms 9716 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 9564 KB Output is correct
11 Correct 2 ms 9740 KB Output is correct
12 Correct 2 ms 9716 KB Output is correct
13 Correct 2 ms 9564 KB Output is correct
14 Correct 2 ms 9564 KB Output is correct
15 Correct 2 ms 9560 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 2 ms 9560 KB Output is correct
18 Correct 2 ms 9564 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 2 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 9652 KB Output is correct
29 Correct 3 ms 10100 KB Output is correct
30 Correct 3 ms 9656 KB Output is correct
31 Correct 3 ms 9820 KB Output is correct
32 Correct 3 ms 9816 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 9564 KB Output is correct
36 Correct 2 ms 9820 KB Output is correct
37 Correct 3 ms 9820 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 2 ms 9648 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 2 ms 9564 KB Output is correct
7 Correct 2 ms 9716 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 9564 KB Output is correct
11 Correct 2 ms 9740 KB Output is correct
12 Correct 2 ms 9716 KB Output is correct
13 Correct 2 ms 9564 KB Output is correct
14 Correct 2 ms 9564 KB Output is correct
15 Correct 2 ms 9560 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 2 ms 9560 KB Output is correct
18 Correct 2 ms 9564 KB Output is correct
19 Correct 104 ms 15728 KB Output is correct
20 Correct 106 ms 15696 KB Output is correct
21 Correct 108 ms 15964 KB Output is correct
22 Correct 116 ms 16084 KB Output is correct
23 Correct 54 ms 15696 KB Output is correct
24 Correct 50 ms 15700 KB Output is correct
25 Correct 85 ms 18268 KB Output is correct
26 Correct 71 ms 21972 KB Output is correct
27 Correct 124 ms 19536 KB Output is correct
28 Correct 174 ms 30548 KB Output is correct
29 Correct 169 ms 29780 KB Output is correct
30 Correct 130 ms 19380 KB Output is correct
31 Correct 135 ms 19284 KB Output is correct
32 Correct 129 ms 19740 KB Output is correct
33 Correct 166 ms 18396 KB Output is correct
34 Correct 110 ms 18260 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 2 ms 9648 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 2 ms 9564 KB Output is correct
7 Correct 2 ms 9716 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 9564 KB Output is correct
11 Correct 2 ms 9740 KB Output is correct
12 Correct 2 ms 9716 KB Output is correct
13 Correct 2 ms 9564 KB Output is correct
14 Correct 2 ms 9564 KB Output is correct
15 Correct 2 ms 9560 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 2 ms 9560 KB Output is correct
18 Correct 2 ms 9564 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 2 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 9652 KB Output is correct
29 Correct 3 ms 10100 KB Output is correct
30 Correct 3 ms 9656 KB Output is correct
31 Correct 3 ms 9820 KB Output is correct
32 Correct 3 ms 9816 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 9564 KB Output is correct
36 Correct 2 ms 9820 KB Output is correct
37 Correct 3 ms 9820 KB Output is correct
38 Correct 3 ms 9820 KB Output is correct
39 Correct 104 ms 15728 KB Output is correct
40 Correct 106 ms 15696 KB Output is correct
41 Correct 108 ms 15964 KB Output is correct
42 Correct 116 ms 16084 KB Output is correct
43 Correct 54 ms 15696 KB Output is correct
44 Correct 50 ms 15700 KB Output is correct
45 Correct 85 ms 18268 KB Output is correct
46 Correct 71 ms 21972 KB Output is correct
47 Correct 124 ms 19536 KB Output is correct
48 Correct 174 ms 30548 KB Output is correct
49 Correct 169 ms 29780 KB Output is correct
50 Correct 130 ms 19380 KB Output is correct
51 Correct 135 ms 19284 KB Output is correct
52 Correct 129 ms 19740 KB Output is correct
53 Correct 166 ms 18396 KB Output is correct
54 Correct 110 ms 18260 KB Output is correct
55 Correct 14 ms 10076 KB Output is correct
56 Correct 10 ms 10264 KB Output is correct
57 Correct 87 ms 16448 KB Output is correct
58 Correct 34 ms 15812 KB Output is correct
59 Correct 189 ms 25040 KB Output is correct
60 Correct 593 ms 39472 KB Output is correct
61 Correct 164 ms 19652 KB Output is correct
62 Correct 176 ms 19688 KB Output is correct
63 Correct 192 ms 19700 KB Output is correct
64 Correct 613 ms 24352 KB Output is correct
65 Correct 135 ms 19648 KB Output is correct
66 Correct 373 ms 27904 KB Output is correct
67 Correct 86 ms 19840 KB Output is correct
68 Correct 285 ms 23308 KB Output is correct
69 Correct 286 ms 23192 KB Output is correct
70 Correct 275 ms 23124 KB Output is correct