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답안 #1004528

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1004528 2024-06-21T09:37:16 Z Gray 경주 (Race) (IOI11_race) C++17
21 / 100
 648 ms 262144 KB 
#include<bits/stdc++.h>
#include "race.h"
using namespace std;
#define ll long long
#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;
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, set<pair<ll, ll>> &usg, ll level, ll dep){

  usg.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, usg, level+e[i].ff, dep+1);
  }
}
void cedfs(ll u, ll &mn, ll wsz){
  ll centr = -1;
  findcentroid(u,u, 0, centr, wsz);
  assert(centr!=-1);
  set<pair<ll, ll>> levs, full;
  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, levs, 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 = 2e18;
  cedfs(0, mn, getsz(0, 0));
  return (mn==2e18?-1:mn);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 860 KB Output is correct
2 Correct 1 ms 860 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 1 ms 860 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 860 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 1 ms 860 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 2 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 860 KB Output is correct
16 Correct 1 ms 860 KB Output is correct
17 Correct 1 ms 856 KB Output is correct
18 Correct 2 ms 860 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 860 KB Output is correct
2 Correct 1 ms 860 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 1 ms 860 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 860 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 1 ms 860 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 2 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 860 KB Output is correct
16 Correct 1 ms 860 KB Output is correct
17 Correct 1 ms 856 KB Output is correct
18 Correct 2 ms 860 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 404 KB Output is correct
21 Correct 3 ms 860 KB Output is correct
22 Correct 4 ms 1284 KB Output is correct
23 Correct 8 ms 2396 KB Output is correct
24 Correct 4 ms 1116 KB Output is correct
25 Correct 3 ms 860 KB Output is correct
26 Correct 3 ms 860 KB Output is correct
27 Correct 1 ms 600 KB Output is correct
28 Correct 4 ms 860 KB Output is correct
29 Correct 4 ms 856 KB Output is correct
30 Correct 3 ms 860 KB Output is correct
31 Correct 3 ms 860 KB Output is correct
32 Correct 3 ms 860 KB Output is correct
33 Correct 5 ms 1116 KB Output is correct
34 Correct 30 ms 12892 KB Output is correct
35 Correct 37 ms 15964 KB Output is correct
36 Correct 43 ms 20152 KB Output is correct
37 Correct 16 ms 6744 KB Output is correct
38 Correct 18 ms 4188 KB Output is correct

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 860 KB Output is correct
2 Correct 1 ms 860 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 1 ms 860 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 860 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 1 ms 860 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 2 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 860 KB Output is correct
16 Correct 1 ms 860 KB Output is correct
17 Correct 1 ms 856 KB Output is correct
18 Correct 2 ms 860 KB Output is correct
19 Correct 648 ms 14224 KB Output is correct
20 Correct 622 ms 15696 KB Output is correct
21 Correct 442 ms 13676 KB Output is correct
22 Correct 320 ms 13348 KB Output is correct
23 Correct 391 ms 21208 KB Output is correct
24 Correct 128 ms 13336 KB Output is correct
25 Runtime error 627 ms 262144 KB Execution killed with signal 9
26 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 860 KB Output is correct
2 Correct 1 ms 860 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 1 ms 860 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 860 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 1 ms 860 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 2 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 860 KB Output is correct
16 Correct 1 ms 860 KB Output is correct
17 Correct 1 ms 856 KB Output is correct
18 Correct 2 ms 860 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 404 KB Output is correct
21 Correct 3 ms 860 KB Output is correct
22 Correct 4 ms 1284 KB Output is correct
23 Correct 8 ms 2396 KB Output is correct
24 Correct 4 ms 1116 KB Output is correct
25 Correct 3 ms 860 KB Output is correct
26 Correct 3 ms 860 KB Output is correct
27 Correct 1 ms 600 KB Output is correct
28 Correct 4 ms 860 KB Output is correct
29 Correct 4 ms 856 KB Output is correct
30 Correct 3 ms 860 KB Output is correct
31 Correct 3 ms 860 KB Output is correct
32 Correct 3 ms 860 KB Output is correct
33 Correct 5 ms 1116 KB Output is correct
34 Correct 30 ms 12892 KB Output is correct
35 Correct 37 ms 15964 KB Output is correct
36 Correct 43 ms 20152 KB Output is correct
37 Correct 16 ms 6744 KB Output is correct
38 Correct 18 ms 4188 KB Output is correct
39 Correct 648 ms 14224 KB Output is correct
40 Correct 622 ms 15696 KB Output is correct
41 Correct 442 ms 13676 KB Output is correct
42 Correct 320 ms 13348 KB Output is correct
43 Correct 391 ms 21208 KB Output is correct
44 Correct 128 ms 13336 KB Output is correct
45 Runtime error 627 ms 262144 KB Execution killed with signal 9
46 Halted 0 ms 0 KB -