oj.uz

Submission #1004558

# Submission time Handle Problem Language Result Execution time Memory
1004558 2024-06-21T09:48:41 Z Gray Race (IOI11_race) C++17
21 / 100
 3000 ms 20928 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>> levs, full;
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.insert({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){
  levs.clear(); 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 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 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 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 3 ms 348 KB Output is correct
22 Correct 3 ms 604 KB Output is correct
23 Correct 5 ms 624 KB Output is correct
24 Correct 2 ms 604 KB Output is correct
25 Correct 2 ms 604 KB Output is correct
26 Correct 2 ms 448 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 2 ms 604 KB Output is correct
29 Correct 2 ms 604 KB Output is correct
30 Correct 2 ms 604 KB Output is correct
31 Correct 2 ms 604 KB Output is correct
32 Correct 2 ms 604 KB Output is correct
33 Correct 4 ms 856 KB Output is correct
34 Correct 23 ms 604 KB Output is correct
35 Correct 22 ms 624 KB Output is correct
36 Correct 24 ms 624 KB Output is correct
37 Correct 11 ms 604 KB Output is correct
38 Correct 9 ms 604 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 489 ms 8796 KB Output is correct
20 Correct 511 ms 8932 KB Output is correct
21 Correct 375 ms 9040 KB Output is correct
22 Correct 262 ms 8784 KB Output is correct
23 Correct 433 ms 9308 KB Output is correct
24 Correct 137 ms 9044 KB Output is correct
25 Execution timed out 3047 ms 20928 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 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 3 ms 348 KB Output is correct
22 Correct 3 ms 604 KB Output is correct
23 Correct 5 ms 624 KB Output is correct
24 Correct 2 ms 604 KB Output is correct
25 Correct 2 ms 604 KB Output is correct
26 Correct 2 ms 448 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 2 ms 604 KB Output is correct
29 Correct 2 ms 604 KB Output is correct
30 Correct 2 ms 604 KB Output is correct
31 Correct 2 ms 604 KB Output is correct
32 Correct 2 ms 604 KB Output is correct
33 Correct 4 ms 856 KB Output is correct
34 Correct 23 ms 604 KB Output is correct
35 Correct 22 ms 624 KB Output is correct
36 Correct 24 ms 624 KB Output is correct
37 Correct 11 ms 604 KB Output is correct
38 Correct 9 ms 604 KB Output is correct
39 Correct 489 ms 8796 KB Output is correct
40 Correct 511 ms 8932 KB Output is correct
41 Correct 375 ms 9040 KB Output is correct
42 Correct 262 ms 8784 KB Output is correct
43 Correct 433 ms 9308 KB Output is correct
44 Correct 137 ms 9044 KB Output is correct
45 Execution timed out 3047 ms 20928 KB Time limit exceeded
46 Halted 0 ms 0 KB -