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답안 #1004520

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1004520 2024-06-21T09:35:04 Z Gray 경주 (Race) (IOI11_race) C++17
21 / 100
 1848 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){
  auto it = usg.lower_bound({level, -1});
  if (usg.empty() or it==usg.end() or ((*it).ff==level and (*it).ss>dep) or (*it).ff!=level) {
    if (!usg.empty() and it!=usg.end() and (*it).ff==level){
      usg.erase(it);
    }
    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 0 ms 348 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 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 860 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 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 0 ms 348 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 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 860 KB Output is correct
17 Correct 1 ms 860 KB Output is correct
18 Correct 1 ms 860 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 2 ms 604 KB Output is correct
22 Correct 5 ms 1424 KB Output is correct
23 Correct 9 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 980 KB Output is correct
27 Correct 1 ms 560 KB Output is correct
28 Correct 4 ms 860 KB Output is correct
29 Correct 2 ms 1112 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 4 ms 1116 KB Output is correct
34 Correct 29 ms 12644 KB Output is correct
35 Correct 37 ms 15960 KB Output is correct
36 Correct 41 ms 20052 KB Output is correct
37 Correct 16 ms 6748 KB Output is correct
38 Correct 13 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 0 ms 348 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 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 860 KB Output is correct
17 Correct 1 ms 860 KB Output is correct
18 Correct 1 ms 860 KB Output is correct
19 Correct 456 ms 11600 KB Output is correct
20 Correct 449 ms 12604 KB Output is correct
21 Correct 342 ms 12040 KB Output is correct
22 Correct 245 ms 12488 KB Output is correct
23 Correct 306 ms 14608 KB Output is correct
24 Correct 137 ms 12520 KB Output is correct
25 Runtime error 1848 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 0 ms 348 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 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 860 KB Output is correct
17 Correct 1 ms 860 KB Output is correct
18 Correct 1 ms 860 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 2 ms 604 KB Output is correct
22 Correct 5 ms 1424 KB Output is correct
23 Correct 9 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 980 KB Output is correct
27 Correct 1 ms 560 KB Output is correct
28 Correct 4 ms 860 KB Output is correct
29 Correct 2 ms 1112 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 4 ms 1116 KB Output is correct
34 Correct 29 ms 12644 KB Output is correct
35 Correct 37 ms 15960 KB Output is correct
36 Correct 41 ms 20052 KB Output is correct
37 Correct 16 ms 6748 KB Output is correct
38 Correct 13 ms 4188 KB Output is correct
39 Correct 456 ms 11600 KB Output is correct
40 Correct 449 ms 12604 KB Output is correct
41 Correct 342 ms 12040 KB Output is correct
42 Correct 245 ms 12488 KB Output is correct
43 Correct 306 ms 14608 KB Output is correct
44 Correct 137 ms 12520 KB Output is correct
45 Runtime error 1848 ms 262144 KB Execution killed with signal 9
46 Halted 0 ms 0 KB -