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답안 #720701

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
720701 2023-04-09T03:48:22 Z joelgun14 경주 (Race) (IOI11_race) C++17
100 / 100
 413 ms 93016 KB 
#include "race.h"
#include <bits/stdc++.h>
#define ll long long
using namespace std;
int l;
int res = 1e9;
const int lim = 2e5 + 5;
int depth[lim];
bool vis[lim];
vector<pair<int, int>> edges[lim];
struct disjoint_set {
  int h[lim], sz[lim], d[lim];
  ll shift[lim];
  // fi -> distance
  // se -> depth
  // cari depth terkecil
  set<pair<int, int>> a[lim];
  disjoint_set() {
    memset(h, -1, sizeof(h));
    //memset(sz, 0, sizeof(sz));
    fill(sz, sz + lim, 1);
    memset(shift, 0, sizeof(shift));
    memset(d, -1, sizeof(d));
  }
  int fh(int nd) {
    return h[nd] == -1 ? nd : h[nd] = fh(h[nd]);
  }
  bool merge(int x, int y) {
    x = fh(x), y = fh(y);
    if(x != y) {
      if(sz[x] < sz[y])
        swap(x, y);
      sz[x] += sz[y];
      h[y] = x;
      if(a[x].size() < a[y].size()) {
        swap(a[x], a[y]);
        swap(shift[x], shift[y]);
      }
      //cout << d[x] << " " << d[y] << endl;
      //cout << x << " " << y << endl;
      d[x] = min(d[x], d[y]);
      for(auto i : a[y]) {
        // coba cari di a[x] yg panjangnya pas
        int target = l - i.first - shift[x] - shift[y];
        // cari target di a[x];
        if(a[x].lower_bound(make_pair(target, 0)) != a[x].end() && (*a[x].lower_bound(make_pair(target, 0))).first == target) {
          //cout << d[x] << endl;
          //cout << i.first + shift[y] << " " << (*a[x].lower_bound(make_pair(target, 0))).first + shift[x] << endl;
          //cout << i.second << " " << (*a[x].lower_bound(make_pair(target, 0))).second << endl;
          res = min(res, (*a[x].lower_bound(make_pair(target, 0))).second + i.second - 2 * d[x]);
        }
      }
      for(auto i : a[y]) {
        auto tmp = i;
        tmp.first += shift[y] - shift[x];
        //cout << x << " " << shift[x] << " " << tmp.first << " " << tmp.second << endl;
        a[x].insert(tmp);
      }
      //for(auto i : a[x]) {
        //cout << "CUR " << x << " " << shift[x] << " " << i.first << " " << i.second << endl;
      //}
    }
    return x != y;
  }
};

disjoint_set dsu;
void dfs(int nd = 0) {
  //cout << "NODE " << nd << " " << depth[nd] << endl;
  vis[nd] = 1;
  dsu.a[nd].insert(make_pair(0, depth[nd]));
  dsu.d[nd] = depth[nd];
  for(auto i : edges[nd]) {
    if(!vis[i.first]) {
      depth[i.first] = depth[nd] + 1;
      dfs(i.first);
      dsu.shift[dsu.fh(i.first)] += i.second;
      //cout << "MERGE " << nd << endl;
      dsu.merge(i.first, nd);
    }
  }
}

int best_path(int N, int K, int H[][2], int L[])
{
  l = K;
  for(int i = 0; i < N - 1; ++i) {
    edges[H[i][0]].push_back(make_pair(H[i][1], L[i]));
    edges[H[i][1]].push_back(make_pair(H[i][0], L[i]));
  }
  dfs();
  if(res == 1e9)
    return -1;
  else
    return res;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 18260 KB Output is correct
2 Correct 8 ms 18260 KB Output is correct
3 Correct 9 ms 18280 KB Output is correct
4 Correct 9 ms 18332 KB Output is correct
5 Correct 9 ms 18260 KB Output is correct
6 Correct 9 ms 18248 KB Output is correct
7 Correct 10 ms 18260 KB Output is correct
8 Correct 10 ms 18316 KB Output is correct
9 Correct 10 ms 18252 KB Output is correct
10 Correct 9 ms 18364 KB Output is correct
11 Correct 10 ms 18260 KB Output is correct
12 Correct 10 ms 18248 KB Output is correct
13 Correct 9 ms 18256 KB Output is correct
14 Correct 10 ms 18260 KB Output is correct
15 Correct 9 ms 18260 KB Output is correct
16 Correct 9 ms 18264 KB Output is correct
17 Correct 10 ms 18260 KB Output is correct
18 Correct 9 ms 18260 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 18260 KB Output is correct
2 Correct 8 ms 18260 KB Output is correct
3 Correct 9 ms 18280 KB Output is correct
4 Correct 9 ms 18332 KB Output is correct
5 Correct 9 ms 18260 KB Output is correct
6 Correct 9 ms 18248 KB Output is correct
7 Correct 10 ms 18260 KB Output is correct
8 Correct 10 ms 18316 KB Output is correct
9 Correct 10 ms 18252 KB Output is correct
10 Correct 9 ms 18364 KB Output is correct
11 Correct 10 ms 18260 KB Output is correct
12 Correct 10 ms 18248 KB Output is correct
13 Correct 9 ms 18256 KB Output is correct
14 Correct 10 ms 18260 KB Output is correct
15 Correct 9 ms 18260 KB Output is correct
16 Correct 9 ms 18264 KB Output is correct
17 Correct 10 ms 18260 KB Output is correct
18 Correct 9 ms 18260 KB Output is correct
19 Correct 9 ms 18260 KB Output is correct
20 Correct 9 ms 18252 KB Output is correct
21 Correct 9 ms 18516 KB Output is correct
22 Correct 10 ms 18568 KB Output is correct
23 Correct 10 ms 18464 KB Output is correct
24 Correct 11 ms 18468 KB Output is correct
25 Correct 10 ms 18464 KB Output is correct
26 Correct 11 ms 18512 KB Output is correct
27 Correct 10 ms 18468 KB Output is correct
28 Correct 11 ms 18576 KB Output is correct
29 Correct 10 ms 18460 KB Output is correct
30 Correct 11 ms 18516 KB Output is correct
31 Correct 10 ms 18516 KB Output is correct
32 Correct 10 ms 18516 KB Output is correct
33 Correct 10 ms 18516 KB Output is correct
34 Correct 10 ms 18516 KB Output is correct
35 Correct 10 ms 18516 KB Output is correct
36 Correct 10 ms 18460 KB Output is correct
37 Correct 11 ms 18456 KB Output is correct
38 Correct 12 ms 18464 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 18260 KB Output is correct
2 Correct 8 ms 18260 KB Output is correct
3 Correct 9 ms 18280 KB Output is correct
4 Correct 9 ms 18332 KB Output is correct
5 Correct 9 ms 18260 KB Output is correct
6 Correct 9 ms 18248 KB Output is correct
7 Correct 10 ms 18260 KB Output is correct
8 Correct 10 ms 18316 KB Output is correct
9 Correct 10 ms 18252 KB Output is correct
10 Correct 9 ms 18364 KB Output is correct
11 Correct 10 ms 18260 KB Output is correct
12 Correct 10 ms 18248 KB Output is correct
13 Correct 9 ms 18256 KB Output is correct
14 Correct 10 ms 18260 KB Output is correct
15 Correct 9 ms 18260 KB Output is correct
16 Correct 9 ms 18264 KB Output is correct
17 Correct 10 ms 18260 KB Output is correct
18 Correct 9 ms 18260 KB Output is correct
19 Correct 140 ms 39020 KB Output is correct
20 Correct 152 ms 40308 KB Output is correct
21 Correct 156 ms 39788 KB Output is correct
22 Correct 151 ms 38732 KB Output is correct
23 Correct 175 ms 49796 KB Output is correct
24 Correct 152 ms 39600 KB Output is correct
25 Correct 139 ms 45836 KB Output is correct
26 Correct 79 ms 52524 KB Output is correct
27 Correct 223 ms 48888 KB Output is correct
28 Correct 303 ms 87128 KB Output is correct
29 Correct 290 ms 85168 KB Output is correct
30 Correct 210 ms 48780 KB Output is correct
31 Correct 232 ms 48744 KB Output is correct
32 Correct 303 ms 48792 KB Output is correct
33 Correct 248 ms 49884 KB Output is correct
34 Correct 335 ms 74904 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 18260 KB Output is correct
2 Correct 8 ms 18260 KB Output is correct
3 Correct 9 ms 18280 KB Output is correct
4 Correct 9 ms 18332 KB Output is correct
5 Correct 9 ms 18260 KB Output is correct
6 Correct 9 ms 18248 KB Output is correct
7 Correct 10 ms 18260 KB Output is correct
8 Correct 10 ms 18316 KB Output is correct
9 Correct 10 ms 18252 KB Output is correct
10 Correct 9 ms 18364 KB Output is correct
11 Correct 10 ms 18260 KB Output is correct
12 Correct 10 ms 18248 KB Output is correct
13 Correct 9 ms 18256 KB Output is correct
14 Correct 10 ms 18260 KB Output is correct
15 Correct 9 ms 18260 KB Output is correct
16 Correct 9 ms 18264 KB Output is correct
17 Correct 10 ms 18260 KB Output is correct
18 Correct 9 ms 18260 KB Output is correct
19 Correct 9 ms 18260 KB Output is correct
20 Correct 9 ms 18252 KB Output is correct
21 Correct 9 ms 18516 KB Output is correct
22 Correct 10 ms 18568 KB Output is correct
23 Correct 10 ms 18464 KB Output is correct
24 Correct 11 ms 18468 KB Output is correct
25 Correct 10 ms 18464 KB Output is correct
26 Correct 11 ms 18512 KB Output is correct
27 Correct 10 ms 18468 KB Output is correct
28 Correct 11 ms 18576 KB Output is correct
29 Correct 10 ms 18460 KB Output is correct
30 Correct 11 ms 18516 KB Output is correct
31 Correct 10 ms 18516 KB Output is correct
32 Correct 10 ms 18516 KB Output is correct
33 Correct 10 ms 18516 KB Output is correct
34 Correct 10 ms 18516 KB Output is correct
35 Correct 10 ms 18516 KB Output is correct
36 Correct 10 ms 18460 KB Output is correct
37 Correct 11 ms 18456 KB Output is correct
38 Correct 12 ms 18464 KB Output is correct
39 Correct 140 ms 39020 KB Output is correct
40 Correct 152 ms 40308 KB Output is correct
41 Correct 156 ms 39788 KB Output is correct
42 Correct 151 ms 38732 KB Output is correct
43 Correct 175 ms 49796 KB Output is correct
44 Correct 152 ms 39600 KB Output is correct
45 Correct 139 ms 45836 KB Output is correct
46 Correct 79 ms 52524 KB Output is correct
47 Correct 223 ms 48888 KB Output is correct
48 Correct 303 ms 87128 KB Output is correct
49 Correct 290 ms 85168 KB Output is correct
50 Correct 210 ms 48780 KB Output is correct
51 Correct 232 ms 48744 KB Output is correct
52 Correct 303 ms 48792 KB Output is correct
53 Correct 248 ms 49884 KB Output is correct
54 Correct 335 ms 74904 KB Output is correct
55 Correct 24 ms 21020 KB Output is correct
56 Correct 16 ms 20052 KB Output is correct
57 Correct 102 ms 36276 KB Output is correct
58 Correct 56 ms 29584 KB Output is correct
59 Correct 76 ms 52596 KB Output is correct
60 Correct 294 ms 85660 KB Output is correct
61 Correct 237 ms 53116 KB Output is correct
62 Correct 189 ms 48852 KB Output is correct
63 Correct 314 ms 48912 KB Output is correct
64 Correct 407 ms 93016 KB Output is correct
65 Correct 413 ms 86936 KB Output is correct
66 Correct 296 ms 80580 KB Output is correct
67 Correct 197 ms 42404 KB Output is correct
68 Correct 353 ms 60576 KB Output is correct
69 Correct 404 ms 64976 KB Output is correct
70 Correct 340 ms 58948 KB Output is correct