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Submission #1020682

# Submission time Handle Problem Language Result Execution time Memory
1020682 2024-07-12T08:26:26 Z NeroZein Fountain Parks (IOI21_parks) C++17
5 / 100
 326 ms 66312 KB 
#include "parks.h"
#include <bits/stdc++.h>

using namespace std; 

const int MAXY = 2e5 + 5; 

map<pair<int, int>, int> mp;
vector<pair<int, int>> inY[MAXY];

int construct_roads(vector<int> x, vector<int> y) {
  int n = (int) x.size();
  for (int i = 0; i < n; ++i) {
    inY[y[i]].emplace_back(x[i], i); 
    mp[{x[i], y[i]}] = i;
  }
  set<pair<int, int>> se;
  vector<int> u, v, a, b;
  vector<vector<int>> g(n); 
  auto addedge = [&](int uu, int vv, int aa, int bb) {
    u.push_back(uu);
    v.push_back(vv);
    a.push_back(aa);
    b.push_back(bb);
    g[uu].push_back(vv);
    g[vv].push_back(uu);
    se.insert({aa, bb}); 
  };
  for (int cury = 2; cury < MAXY; cury += 2) {//add vertical lines
    int cnt = 0;
    sort(inY[cury].begin(), inY[cury].end());
    for (int j = 0; j < (int) inY[cury].size(); ++j) {
      auto [curx, id] = inY[cury][j];
      if (mp.count({curx, cury + 2})) {
        cnt++; 
      }
    }
    for (int j = 0; j < (int) inY[cury].size(); ++j) {
      auto [curx, id] = inY[cury][j];
      if (!mp.count({curx, cury + 2})) {
        continue; 
      }
      addedge(id, mp[{curx, cury + 2}], curx - 1, cury + 1);
      //if (curx == 2) {
      //} else if (curx == 6) {
        //addedge(id, mp[{curx, cury + 2}], curx + 1, cury + 1);
      //} else if (cnt == 1) {
        //addedge(id, mp[{curx, cury + 2}], curx + (cury % 4 == 0 ? -1 : 1), cury + 1);
      //}
    }
  }
  for (int cury = 2; cury < MAXY; cury += 2) {//add horizontal lines (x, y) -> (x + 2, y)
    for (int j = 0; j < (int) inY[cury].size() - 1; ++j) {
      auto [curx, id] = inY[cury][j];
      if (inY[cury][j + 1].first - curx > 2) continue; 
      if (se.count({curx + 1, cury - 1})) {
        addedge(id, inY[cury][j + 1].second, curx + 1, cury + 1);
      } else {
        addedge(id, inY[cury][j + 1].second, curx + 1, cury - 1);
      }
    }
  }
  vector<bool> vis(n);
  function<void(int)> dfs = [&](int nd) {
    vis[nd] = true;
    for (int ch : g[nd]) {
      if (!vis[ch]) {
        dfs(ch);        
      }
    }
  };
  dfs(0); 
  for (int i = 0; i < n; ++i) {
    if (!vis[i]) {
      return 0; 
    }
  }
  build(u, v, a, b); 
  return 1;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 1 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 1 ms 4956 KB Output is correct
8 Correct 1 ms 4956 KB Output is correct
9 Correct 124 ms 36572 KB Output is correct
10 Correct 9 ms 8300 KB Output is correct
11 Correct 48 ms 22356 KB Output is correct
12 Correct 13 ms 9888 KB Output is correct
13 Correct 30 ms 16904 KB Output is correct
14 Correct 2 ms 5208 KB Output is correct
15 Correct 2 ms 5468 KB Output is correct
16 Correct 120 ms 34304 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 1 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 1 ms 4956 KB Output is correct
8 Correct 1 ms 4956 KB Output is correct
9 Correct 124 ms 36572 KB Output is correct
10 Correct 9 ms 8300 KB Output is correct
11 Correct 48 ms 22356 KB Output is correct
12 Correct 13 ms 9888 KB Output is correct
13 Correct 30 ms 16904 KB Output is correct
14 Correct 2 ms 5208 KB Output is correct
15 Correct 2 ms 5468 KB Output is correct
16 Correct 120 ms 34304 KB Output is correct
17 Correct 1 ms 4956 KB Output is correct
18 Correct 1 ms 4956 KB Output is correct
19 Incorrect 1 ms 4956 KB Tree @(3, 5) appears more than once: for edges on positions 3 and 5
20 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 1 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 1 ms 4956 KB Output is correct
8 Correct 1 ms 4956 KB Output is correct
9 Correct 124 ms 36572 KB Output is correct
10 Correct 9 ms 8300 KB Output is correct
11 Correct 48 ms 22356 KB Output is correct
12 Correct 13 ms 9888 KB Output is correct
13 Correct 30 ms 16904 KB Output is correct
14 Correct 2 ms 5208 KB Output is correct
15 Correct 2 ms 5468 KB Output is correct
16 Correct 120 ms 34304 KB Output is correct
17 Correct 1 ms 4956 KB Output is correct
18 Correct 1 ms 4956 KB Output is correct
19 Incorrect 1 ms 4956 KB Tree @(3, 5) appears more than once: for edges on positions 3 and 5
20 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 1 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 1 ms 4956 KB Output is correct
8 Correct 1 ms 4956 KB Output is correct
9 Correct 124 ms 36572 KB Output is correct
10 Correct 9 ms 8300 KB Output is correct
11 Correct 48 ms 22356 KB Output is correct
12 Correct 13 ms 9888 KB Output is correct
13 Correct 30 ms 16904 KB Output is correct
14 Correct 2 ms 5208 KB Output is correct
15 Correct 2 ms 5468 KB Output is correct
16 Correct 120 ms 34304 KB Output is correct
17 Correct 2 ms 4952 KB Output is correct
18 Correct 1 ms 4956 KB Output is correct
19 Correct 1 ms 4956 KB Output is correct
20 Correct 282 ms 65920 KB Output is correct
21 Correct 277 ms 64936 KB Output is correct
22 Correct 322 ms 63656 KB Output is correct
23 Correct 232 ms 53792 KB Output is correct
24 Correct 181 ms 29208 KB Output is correct
25 Correct 225 ms 47780 KB Output is correct
26 Correct 272 ms 47780 KB Output is correct
27 Correct 307 ms 54184 KB Output is correct
28 Correct 326 ms 54184 KB Output is correct
29 Correct 285 ms 53876 KB Output is correct
30 Incorrect 288 ms 54128 KB Tree @(999, 7) appears more than once: for edges on positions 2 and 1793
31 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 1 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 1 ms 4956 KB Output is correct
8 Correct 1 ms 4956 KB Output is correct
9 Correct 124 ms 36572 KB Output is correct
10 Correct 9 ms 8300 KB Output is correct
11 Correct 48 ms 22356 KB Output is correct
12 Correct 13 ms 9888 KB Output is correct
13 Correct 30 ms 16904 KB Output is correct
14 Correct 2 ms 5208 KB Output is correct
15 Correct 2 ms 5468 KB Output is correct
16 Correct 120 ms 34304 KB Output is correct
17 Correct 278 ms 65356 KB Output is correct
18 Incorrect 283 ms 66312 KB Tree @(50001, 50003) appears more than once: for edges on positions 50000 and 149999
19 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 1 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 1 ms 4956 KB Output is correct
8 Correct 1 ms 4956 KB Output is correct
9 Correct 124 ms 36572 KB Output is correct
10 Correct 9 ms 8300 KB Output is correct
11 Correct 48 ms 22356 KB Output is correct
12 Correct 13 ms 9888 KB Output is correct
13 Correct 30 ms 16904 KB Output is correct
14 Correct 2 ms 5208 KB Output is correct
15 Correct 2 ms 5468 KB Output is correct
16 Correct 120 ms 34304 KB Output is correct
17 Correct 1 ms 4956 KB Output is correct
18 Correct 1 ms 4956 KB Output is correct
19 Incorrect 1 ms 4956 KB Tree @(3, 5) appears more than once: for edges on positions 3 and 5
20 Halted 0 ms 0 KB -