oj.uz

Submission #986832

# Submission time Handle Problem Language Result Execution time Memory
986832 2024-05-21T10:09:27 Z huutuan Race (IOI11_race) C++14
100 / 100
 385 ms 66960 KB 
#include "race.h"

#include <bits/stdc++.h>

using namespace std;

#define int long long

const int N=2e5+10, inf=1e9;
int n, k, tin[N], tout[N], tdfs, tour[N];
vector<pair<int, int>> g[N];
int dep[N], dist[N], sz[N];
map<int, int> mp;
int ans;

void dfs_sz(int u, int p){
   tin[u]=++tdfs;
   tour[tdfs]=u;
   for (int i=0; i<(int)g[u].size(); ++i){
      if (g[u][i].first==p){
         g[u].erase(g[u].begin()+i);
         break;
      }
   }
   sz[u]=1;
   for (auto &e:g[u]){
      int v=e.first, w=e.second;
      dep[v]=dep[u]+1;
      dist[v]=dist[u]+w;
      dfs_sz(v, u);
      sz[u]+=sz[v];
      if (sz[v]>sz[g[u][0].first]) swap(e, g[u][0]);
   }
   tout[u]=tdfs;
}

void minimize(int x, int y){
   auto it=mp.find(x);
   if (it==mp.end()) mp[x]=y;
   else it->second=min(it->second, y);
}

int get(int x){
   auto it=mp.find(x);
   if (it==mp.end()) return inf;
   return it->second;
}

void dfs_merge(int u, bool keep){
   if (g[u].empty()){
      if (keep) minimize(dist[u], dep[u]);
      return;
   }
   for (auto &e:g[u]) if (e!=g[u][0]) dfs_merge(e.first, 0);
   dfs_merge(g[u][0].first, 1);
   for (auto &e:g[u]) if (e!=g[u][0]){
      int v=e.first;
      for (int i=tin[v]; i<=tout[v]; ++i){
         int w=tour[i];
         ans=min(ans, get(k-dist[w]+dist[u]*2)+dep[w]-dep[u]*2);
      }
      for (int i=tin[v]; i<=tout[v]; ++i){
         int w=tour[i];
         minimize(dist[w], dep[w]);
      }
   }
   ans=min(ans, get(k+dist[u])-dep[u]);
   minimize(dist[u], dep[u]);
   if (!keep) mp.clear();
}

int32_t best_path(int32_t _N, int32_t K, int32_t H[][2], int32_t L[])
{
   n=_N, k=K;
   for (int i=0; i<n-1; ++i){
      int u=H[i][0]+1, v=H[i][1]+1, w=L[i];
      g[u].emplace_back(v, w);
      g[v].emplace_back(u, w);
   }
   dfs_sz(1, 0);
   ans=inf;
   dfs_merge(1, 0);
   return ans>n?-1:ans;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 2 ms 10588 KB Output is correct
5 Correct 2 ms 10588 KB Output is correct
6 Correct 3 ms 10588 KB Output is correct
7 Correct 2 ms 10584 KB Output is correct
8 Correct 2 ms 10588 KB Output is correct
9 Correct 3 ms 10588 KB Output is correct
10 Correct 2 ms 10588 KB Output is correct
11 Correct 2 ms 10588 KB Output is correct
12 Correct 2 ms 10584 KB Output is correct
13 Correct 2 ms 10584 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 4 ms 10584 KB Output is correct
16 Correct 2 ms 10596 KB Output is correct
17 Correct 2 ms 10588 KB Output is correct
18 Correct 2 ms 10584 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 2 ms 10588 KB Output is correct
5 Correct 2 ms 10588 KB Output is correct
6 Correct 3 ms 10588 KB Output is correct
7 Correct 2 ms 10584 KB Output is correct
8 Correct 2 ms 10588 KB Output is correct
9 Correct 3 ms 10588 KB Output is correct
10 Correct 2 ms 10588 KB Output is correct
11 Correct 2 ms 10588 KB Output is correct
12 Correct 2 ms 10584 KB Output is correct
13 Correct 2 ms 10584 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 4 ms 10584 KB Output is correct
16 Correct 2 ms 10596 KB Output is correct
17 Correct 2 ms 10588 KB Output is correct
18 Correct 2 ms 10584 KB Output is correct
19 Correct 2 ms 10840 KB Output is correct
20 Correct 2 ms 10588 KB Output is correct
21 Correct 3 ms 10588 KB Output is correct
22 Correct 2 ms 10844 KB Output is correct
23 Correct 3 ms 10844 KB Output is correct
24 Correct 3 ms 10676 KB Output is correct
25 Correct 3 ms 10844 KB Output is correct
26 Correct 3 ms 10844 KB Output is correct
27 Correct 2 ms 10584 KB Output is correct
28 Correct 3 ms 10844 KB Output is correct
29 Correct 3 ms 10844 KB Output is correct
30 Correct 4 ms 10844 KB Output is correct
31 Correct 3 ms 10844 KB Output is correct
32 Correct 3 ms 10844 KB Output is correct
33 Correct 3 ms 10840 KB Output is correct
34 Correct 2 ms 10840 KB Output is correct
35 Correct 2 ms 10844 KB Output is correct
36 Correct 2 ms 10844 KB Output is correct
37 Correct 2 ms 10844 KB Output is correct
38 Correct 3 ms 10700 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 2 ms 10588 KB Output is correct
5 Correct 2 ms 10588 KB Output is correct
6 Correct 3 ms 10588 KB Output is correct
7 Correct 2 ms 10584 KB Output is correct
8 Correct 2 ms 10588 KB Output is correct
9 Correct 3 ms 10588 KB Output is correct
10 Correct 2 ms 10588 KB Output is correct
11 Correct 2 ms 10588 KB Output is correct
12 Correct 2 ms 10584 KB Output is correct
13 Correct 2 ms 10584 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 4 ms 10584 KB Output is correct
16 Correct 2 ms 10596 KB Output is correct
17 Correct 2 ms 10588 KB Output is correct
18 Correct 2 ms 10584 KB Output is correct
19 Correct 92 ms 19952 KB Output is correct
20 Correct 94 ms 19952 KB Output is correct
21 Correct 93 ms 19968 KB Output is correct
22 Correct 83 ms 19820 KB Output is correct
23 Correct 107 ms 20308 KB Output is correct
24 Correct 76 ms 19576 KB Output is correct
25 Correct 61 ms 26452 KB Output is correct
26 Correct 51 ms 31872 KB Output is correct
27 Correct 118 ms 30552 KB Output is correct
28 Correct 217 ms 66388 KB Output is correct
29 Correct 225 ms 64532 KB Output is correct
30 Correct 132 ms 30548 KB Output is correct
31 Correct 124 ms 30548 KB Output is correct
32 Correct 177 ms 30480 KB Output is correct
33 Correct 134 ms 29524 KB Output is correct
34 Correct 271 ms 41556 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 2 ms 10588 KB Output is correct
5 Correct 2 ms 10588 KB Output is correct
6 Correct 3 ms 10588 KB Output is correct
7 Correct 2 ms 10584 KB Output is correct
8 Correct 2 ms 10588 KB Output is correct
9 Correct 3 ms 10588 KB Output is correct
10 Correct 2 ms 10588 KB Output is correct
11 Correct 2 ms 10588 KB Output is correct
12 Correct 2 ms 10584 KB Output is correct
13 Correct 2 ms 10584 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 4 ms 10584 KB Output is correct
16 Correct 2 ms 10596 KB Output is correct
17 Correct 2 ms 10588 KB Output is correct
18 Correct 2 ms 10584 KB Output is correct
19 Correct 2 ms 10840 KB Output is correct
20 Correct 2 ms 10588 KB Output is correct
21 Correct 3 ms 10588 KB Output is correct
22 Correct 2 ms 10844 KB Output is correct
23 Correct 3 ms 10844 KB Output is correct
24 Correct 3 ms 10676 KB Output is correct
25 Correct 3 ms 10844 KB Output is correct
26 Correct 3 ms 10844 KB Output is correct
27 Correct 2 ms 10584 KB Output is correct
28 Correct 3 ms 10844 KB Output is correct
29 Correct 3 ms 10844 KB Output is correct
30 Correct 4 ms 10844 KB Output is correct
31 Correct 3 ms 10844 KB Output is correct
32 Correct 3 ms 10844 KB Output is correct
33 Correct 3 ms 10840 KB Output is correct
34 Correct 2 ms 10840 KB Output is correct
35 Correct 2 ms 10844 KB Output is correct
36 Correct 2 ms 10844 KB Output is correct
37 Correct 2 ms 10844 KB Output is correct
38 Correct 3 ms 10700 KB Output is correct
39 Correct 92 ms 19952 KB Output is correct
40 Correct 94 ms 19952 KB Output is correct
41 Correct 93 ms 19968 KB Output is correct
42 Correct 83 ms 19820 KB Output is correct
43 Correct 107 ms 20308 KB Output is correct
44 Correct 76 ms 19576 KB Output is correct
45 Correct 61 ms 26452 KB Output is correct
46 Correct 51 ms 31872 KB Output is correct
47 Correct 118 ms 30552 KB Output is correct
48 Correct 217 ms 66388 KB Output is correct
49 Correct 225 ms 64532 KB Output is correct
50 Correct 132 ms 30548 KB Output is correct
51 Correct 124 ms 30548 KB Output is correct
52 Correct 177 ms 30480 KB Output is correct
53 Correct 134 ms 29524 KB Output is correct
54 Correct 271 ms 41556 KB Output is correct
55 Correct 11 ms 11868 KB Output is correct
56 Correct 7 ms 11356 KB Output is correct
57 Correct 58 ms 20436 KB Output is correct
58 Correct 34 ms 20496 KB Output is correct
59 Correct 68 ms 39216 KB Output is correct
60 Correct 212 ms 66960 KB Output is correct
61 Correct 135 ms 33720 KB Output is correct
62 Correct 116 ms 32484 KB Output is correct
63 Correct 176 ms 32672 KB Output is correct
64 Correct 378 ms 36868 KB Output is correct
65 Correct 385 ms 45216 KB Output is correct
66 Correct 226 ms 60544 KB Output is correct
67 Correct 105 ms 32496 KB Output is correct
68 Correct 243 ms 42644 KB Output is correct
69 Correct 250 ms 40572 KB Output is correct
70 Correct 231 ms 41532 KB Output is correct