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답안 #483513

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
483513 2021-10-30T06:40:20 Z Misuki 경주 (Race) (IOI11_race) C++17
100 / 100
 402 ms 34988 KB 
#include<bits/stdc++.h>

using namespace std;
using pii = pair<int, int>;

const int SIZE = 200000;
int n, k, ans = INT_MAX;
int sub[SIZE], table[1000001];
vector<pii> G[SIZE];
bitset<SIZE> vis;
bitset<1000001> use;

int calc(int V, int P) {
  sub[V] = 1;
  for(pii X : G[V])
    if (!vis[X.first] and X.first != P)
      sub[V] += calc(X.first, V);
  return sub[V];
}

int centroid(int V, int P, int sz) {
  for(pii X : G[V])
    if (!vis[X.first] and X.first != P and sub[X.first] > sz / 2)
      return centroid(X.first, V, sz);
  return V;
}

void calc2(int V, int P, int len, int cost, vector<pii> &vec) {
  if (cost > k)
    return;
  vec.emplace_back(make_pair(cost, len));
  
  for(pii X : G[V]) 
    if (!vis[X.first] and X.first != P)
      calc2(X.first, V, len + 1, cost + X.second, vec);
}

void centroidDecomposite(int V) {
  calc(V, -1);
  int C = centroid(V, -1, sub[V]);
  
  vector<int> update(1, 0);
  use[0] = true, table[0] = 0;
  for(pii X : G[C]) {
    if (vis[X.first]) continue;

    vector<pii> tmp;
    calc2(X.first, C, 1, X.second, tmp);
    for(pii Y : tmp) {
      int cost = Y.first, len = Y.second;
      if (!use[k - cost]) continue;
      ans = min(ans, len + table[k - cost]);
    }
    for(pii Y : tmp) {
      if (!use[Y.first]) {
        table[Y.first] = Y.second, use[Y.first] = true;
        update.emplace_back(Y.first);
      } else {
        table[Y.first] = min(table[Y.first], Y.second);
      }
    }
  }

  for(int X : update)
    use[X] = false;

  vis[C] = true;
  for(pii X : G[C])
    if (!vis[X.first])
      centroidDecomposite(X.first);
}

int best_path(int N, int K, int H[][2], int L[]) {
  n = N, k = K;
  for(int i = 0; i < N - 1; i++) {
    G[H[i][0]].emplace_back(make_pair(H[i][1], L[i]));
    G[H[i][1]].emplace_back(make_pair(H[i][0], L[i]));
  }

  centroidDecomposite(0);

  return ans == INT_MAX ? -1 : ans;
}
/*
int A[SIZE - 1][2];
int B[SIZE - 1];

int main() {
  int n, k;
  cin >> n >> k;
  for(int i = 0; i < n - 1; i++)
    cin >> A[i][0] >> A[i][1];
  for(int i = 0; i < n - 1; i++)
    cin >> B[i];
  cout << best_path(n, k, A, B) << '\n';

  return 0;
}
*/

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 2 ms 4940 KB Output is correct
5 Correct 3 ms 4952 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 5028 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 4 ms 4940 KB Output is correct
18 Correct 2 ms 4940 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 2 ms 4940 KB Output is correct
5 Correct 3 ms 4952 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 5028 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 4 ms 4940 KB Output is correct
18 Correct 2 ms 4940 KB Output is correct
19 Correct 3 ms 5016 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct
21 Correct 3 ms 5068 KB Output is correct
22 Correct 5 ms 7628 KB Output is correct
23 Correct 4 ms 7244 KB Output is correct
24 Correct 4 ms 8012 KB Output is correct
25 Correct 4 ms 6860 KB Output is correct
26 Correct 4 ms 6348 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 4 ms 5836 KB Output is correct
29 Correct 4 ms 6348 KB Output is correct
30 Correct 4 ms 6476 KB Output is correct
31 Correct 4 ms 6860 KB Output is correct
32 Correct 4 ms 6988 KB Output is correct
33 Correct 5 ms 7840 KB Output is correct
34 Correct 4 ms 7372 KB Output is correct
35 Correct 6 ms 8200 KB Output is correct
36 Correct 6 ms 8396 KB Output is correct
37 Correct 4 ms 6988 KB Output is correct
38 Correct 4 ms 6220 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 2 ms 4940 KB Output is correct
5 Correct 3 ms 4952 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 5028 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 4 ms 4940 KB Output is correct
18 Correct 2 ms 4940 KB Output is correct
19 Correct 112 ms 10308 KB Output is correct
20 Correct 110 ms 10344 KB Output is correct
21 Correct 131 ms 10568 KB Output is correct
22 Correct 114 ms 10604 KB Output is correct
23 Correct 73 ms 10432 KB Output is correct
24 Correct 52 ms 10316 KB Output is correct
25 Correct 108 ms 13036 KB Output is correct
26 Correct 91 ms 16760 KB Output is correct
27 Correct 166 ms 15708 KB Output is correct
28 Correct 259 ms 26872 KB Output is correct
29 Correct 247 ms 25968 KB Output is correct
30 Correct 164 ms 15600 KB Output is correct
31 Correct 171 ms 15756 KB Output is correct
32 Correct 200 ms 15640 KB Output is correct
33 Correct 206 ms 14532 KB Output is correct
34 Correct 166 ms 14452 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 2 ms 4940 KB Output is correct
5 Correct 3 ms 4952 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 5028 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 4 ms 4940 KB Output is correct
18 Correct 2 ms 4940 KB Output is correct
19 Correct 3 ms 5016 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct
21 Correct 3 ms 5068 KB Output is correct
22 Correct 5 ms 7628 KB Output is correct
23 Correct 4 ms 7244 KB Output is correct
24 Correct 4 ms 8012 KB Output is correct
25 Correct 4 ms 6860 KB Output is correct
26 Correct 4 ms 6348 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 4 ms 5836 KB Output is correct
29 Correct 4 ms 6348 KB Output is correct
30 Correct 4 ms 6476 KB Output is correct
31 Correct 4 ms 6860 KB Output is correct
32 Correct 4 ms 6988 KB Output is correct
33 Correct 5 ms 7840 KB Output is correct
34 Correct 4 ms 7372 KB Output is correct
35 Correct 6 ms 8200 KB Output is correct
36 Correct 6 ms 8396 KB Output is correct
37 Correct 4 ms 6988 KB Output is correct
38 Correct 4 ms 6220 KB Output is correct
39 Correct 112 ms 10308 KB Output is correct
40 Correct 110 ms 10344 KB Output is correct
41 Correct 131 ms 10568 KB Output is correct
42 Correct 114 ms 10604 KB Output is correct
43 Correct 73 ms 10432 KB Output is correct
44 Correct 52 ms 10316 KB Output is correct
45 Correct 108 ms 13036 KB Output is correct
46 Correct 91 ms 16760 KB Output is correct
47 Correct 166 ms 15708 KB Output is correct
48 Correct 259 ms 26872 KB Output is correct
49 Correct 247 ms 25968 KB Output is correct
50 Correct 164 ms 15600 KB Output is correct
51 Correct 171 ms 15756 KB Output is correct
52 Correct 200 ms 15640 KB Output is correct
53 Correct 206 ms 14532 KB Output is correct
54 Correct 166 ms 14452 KB Output is correct
55 Correct 10 ms 5580 KB Output is correct
56 Correct 10 ms 5540 KB Output is correct
57 Correct 83 ms 11132 KB Output is correct
58 Correct 35 ms 10532 KB Output is correct
59 Correct 109 ms 19216 KB Output is correct
60 Correct 402 ms 34988 KB Output is correct
61 Correct 179 ms 18756 KB Output is correct
62 Correct 188 ms 18772 KB Output is correct
63 Correct 258 ms 18852 KB Output is correct
64 Correct 387 ms 21828 KB Output is correct
65 Correct 215 ms 19508 KB Output is correct
66 Correct 355 ms 31340 KB Output is correct
67 Correct 106 ms 19364 KB Output is correct
68 Correct 238 ms 23240 KB Output is correct
69 Correct 247 ms 23348 KB Output is correct
70 Correct 234 ms 22608 KB Output is correct