oj.uz

Submission #1004575

# Submission time Handle Problem Language Result Execution time Memory
1004575 2024-06-21T09:58:17 Z Gray Race (IOI11_race) C++17
21 / 100
 3000 ms 19296 KB 
#include<bits/stdc++.h>
#include "race.h"
using namespace std;
#define ll int
#define ff first
#define ss second
#define ln "\n"
vector<pair<ll, pair<ll, ll>>> e;
vector<vector<ll>> A;
vector<bool> black;
vector<ll> sz;
set<pair<ll, ll>> full;
vector<pair<ll, ll>> levs;
ll n, k;
ll getsz(ll u, ll p){
  sz[u]=1;
  for (auto i:A[u]){
    if (black[i]) continue;
    ll v = e[i].ss.ff^e[i].ss.ss^u;
    if (v==p) continue;
    sz[u]+=getsz(v, u);
  }
  return sz[u];
}
void findcentroid(ll u, ll p, ll up, ll &centr, ll wsz){
  for (auto i:A[u]){
    if (black[i]) continue;
    ll v = e[i].ss.ff^e[i].ss.ss^u;
    if (v==p) continue;
    if (sz[v]>wsz/2) {findcentroid(v, u, up+1, centr, wsz); return;}
  }
  centr=u;
  return;
}
void dfs(ll u, ll p, ll level, ll dep){

  levs.push_back({level, dep});

  for (auto i:A[u]){
    ll v = e[i].ss.ff^e[i].ss.ss^u;
    if (v==p or black[i]) continue;
    dfs(v, u, level+e[i].ff, dep+1);
  }
}
void cedfs(ll u, ll &mn, ll wsz){
  full.clear();
  ll centr = -1;
  findcentroid(u,u, 0, centr, wsz);
  // assert(centr!=-1);
  for (auto i:A[u]){
    if (black[i]) continue;
    ll v = e[i].ss.ff^e[i].ss.ss^u;
    levs.clear();
    dfs(v, u, e[i].ff, 1);
    for (auto [length, tim]:levs){
      auto it = full.lower_bound({k-length, -1});
      if (!full.empty() and it!=full.end() and (*it).ff==k-length){
        mn=min(mn, tim+(*it).ss);
      }
      if (length==k) {
        mn=min(mn, tim);
      }
    }
    // cout << ln;
    for (auto [length, tim]:levs){
      full.insert({length, tim});
    }
  }
  for (auto i:A[u]){
    if (black[i]) continue;
    black[i]=1;
    ll v = e[i].ss.ff^e[i].ss.ss^u;
    cedfs(v, mn, getsz(v, v));
  }
}


int best_path(int N, int K, int H[][2], int L[])
{
  n = N; k=K;
  e.resize(N-1);
  A.resize(N);
  for (ll i=0; i<n-1; i++){
    A[H[i][0]].push_back(i);
    A[H[i][1]].push_back(i);
    e[i] = {L[i], {H[i][0], H[i][1]}};
  }
  black.resize(N);
  sz.resize(N);
  ll mn = n+1;
  cedfs(0, mn, getsz(0, 0));
  return (mn==n+1?-1:mn);
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 2504 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 2504 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 2396 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 2 ms 576 KB Output is correct
22 Correct 2 ms 348 KB Output is correct
23 Correct 4 ms 348 KB Output is correct
24 Correct 2 ms 348 KB Output is correct
25 Correct 1 ms 2624 KB Output is correct
26 Correct 2 ms 2648 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 2 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 2 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 2 ms 348 KB Output is correct
34 Correct 11 ms 596 KB Output is correct
35 Correct 14 ms 596 KB Output is correct
36 Correct 14 ms 604 KB Output is correct
37 Correct 7 ms 348 KB Output is correct
38 Correct 5 ms 588 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 2504 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 425 ms 9684 KB Output is correct
20 Correct 429 ms 9676 KB Output is correct
21 Correct 309 ms 11208 KB Output is correct
22 Correct 251 ms 11480 KB Output is correct
23 Correct 334 ms 11272 KB Output is correct
24 Correct 137 ms 11472 KB Output is correct
25 Execution timed out 3047 ms 19296 KB Time limit exceeded
26 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 2504 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 2396 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 2 ms 576 KB Output is correct
22 Correct 2 ms 348 KB Output is correct
23 Correct 4 ms 348 KB Output is correct
24 Correct 2 ms 348 KB Output is correct
25 Correct 1 ms 2624 KB Output is correct
26 Correct 2 ms 2648 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 2 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 2 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 2 ms 348 KB Output is correct
34 Correct 11 ms 596 KB Output is correct
35 Correct 14 ms 596 KB Output is correct
36 Correct 14 ms 604 KB Output is correct
37 Correct 7 ms 348 KB Output is correct
38 Correct 5 ms 588 KB Output is correct
39 Correct 425 ms 9684 KB Output is correct
40 Correct 429 ms 9676 KB Output is correct
41 Correct 309 ms 11208 KB Output is correct
42 Correct 251 ms 11480 KB Output is correct
43 Correct 334 ms 11272 KB Output is correct
44 Correct 137 ms 11472 KB Output is correct
45 Execution timed out 3047 ms 19296 KB Time limit exceeded
46 Halted 0 ms 0 KB -