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답안 #1004549

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1004549 2024-06-21T09:44:28 Z Gray 경주 (Race) (IOI11_race) C++17
21 / 100
 775 ms 262144 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;
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 = n+1;
  cedfs(0, mn, getsz(0, 0));
  return (mn==n+1?-1:mn);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 856 KB Output is correct
2 Correct 1 ms 860 KB Output is correct
3 Correct 1 ms 888 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 2908 KB Output is correct
13 Correct 1 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 856 KB Output is correct
17 Correct 1 ms 860 KB Output is correct
18 Correct 1 ms 860 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 856 KB Output is correct
2 Correct 1 ms 860 KB Output is correct
3 Correct 1 ms 888 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 2908 KB Output is correct
13 Correct 1 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 856 KB Output is correct
17 Correct 1 ms 860 KB Output is correct
18 Correct 1 ms 860 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 856 KB Output is correct
22 Correct 4 ms 1112 KB Output is correct
23 Correct 8 ms 1884 KB Output is correct
24 Correct 3 ms 860 KB Output is correct
25 Correct 2 ms 604 KB Output is correct
26 Correct 3 ms 720 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 3 ms 760 KB Output is correct
29 Correct 2 ms 2652 KB Output is correct
30 Correct 3 ms 860 KB Output is correct
31 Correct 2 ms 860 KB Output is correct
32 Correct 3 ms 864 KB Output is correct
33 Correct 4 ms 920 KB Output is correct
34 Correct 25 ms 9684 KB Output is correct
35 Correct 33 ms 12120 KB Output is correct
36 Correct 37 ms 17236 KB Output is correct
37 Correct 16 ms 7256 KB Output is correct
38 Correct 11 ms 5468 KB Output is correct

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 856 KB Output is correct
2 Correct 1 ms 860 KB Output is correct
3 Correct 1 ms 888 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 2908 KB Output is correct
13 Correct 1 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 856 KB Output is correct
17 Correct 1 ms 860 KB Output is correct
18 Correct 1 ms 860 KB Output is correct
19 Correct 485 ms 11348 KB Output is correct
20 Correct 510 ms 12624 KB Output is correct
21 Correct 369 ms 11344 KB Output is correct
22 Correct 297 ms 10976 KB Output is correct
23 Correct 386 ms 16612 KB Output is correct
24 Correct 137 ms 11092 KB Output is correct
25 Runtime error 775 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 856 KB Output is correct
2 Correct 1 ms 860 KB Output is correct
3 Correct 1 ms 888 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 2908 KB Output is correct
13 Correct 1 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 856 KB Output is correct
17 Correct 1 ms 860 KB Output is correct
18 Correct 1 ms 860 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 856 KB Output is correct
22 Correct 4 ms 1112 KB Output is correct
23 Correct 8 ms 1884 KB Output is correct
24 Correct 3 ms 860 KB Output is correct
25 Correct 2 ms 604 KB Output is correct
26 Correct 3 ms 720 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 3 ms 760 KB Output is correct
29 Correct 2 ms 2652 KB Output is correct
30 Correct 3 ms 860 KB Output is correct
31 Correct 2 ms 860 KB Output is correct
32 Correct 3 ms 864 KB Output is correct
33 Correct 4 ms 920 KB Output is correct
34 Correct 25 ms 9684 KB Output is correct
35 Correct 33 ms 12120 KB Output is correct
36 Correct 37 ms 17236 KB Output is correct
37 Correct 16 ms 7256 KB Output is correct
38 Correct 11 ms 5468 KB Output is correct
39 Correct 485 ms 11348 KB Output is correct
40 Correct 510 ms 12624 KB Output is correct
41 Correct 369 ms 11344 KB Output is correct
42 Correct 297 ms 10976 KB Output is correct
43 Correct 386 ms 16612 KB Output is correct
44 Correct 137 ms 11092 KB Output is correct
45 Runtime error 775 ms 262144 KB Execution killed with signal 9
46 Halted 0 ms 0 KB -