oj.uz

Submission #1078053

# Submission time Handle Problem Language Result Execution time Memory
1078053 2024-08-27T12:04:22 Z bleahbleah Fountain Parks (IOI21_parks) C++17
5 / 100
 954 ms 341060 KB 
#include "parks.h"
#include <bits/stdc++.h>

using namespace std;

const int nmax = 2e5 + 5;
using pii = pair<int,int>;
#define sz(x) ((int)(x).size())

map<pii, int> encr;
map<int, pii> decr;
vector<int> g[nmax];
int dirx[4] = {-2, 2, 0, 0}, diry[4] = {0, 0, 2, -2};
int occ[nmax];

vector<pii> edges;
void dfs(int node) {
   occ[node] = 1;
   for(auto x : g[node]) {
      if(occ[x]) continue;
      edges.emplace_back(node, x);
      dfs(x);
   }
   return;
}

pair<vector<int>, vector<int>> unravel(vector<pii>& v) {
   vector<int> a, b;
   for(auto [x, y] : v) a.emplace_back(x), b.emplace_back(y);
   return make_pair(a, b);
}

int construct_roads(std::vector<int> x, std::vector<int> y) {
   for(int i = 0; i < sz(x); i++)
      encr[make_pair(x[i], y[i])] = i;
   for(auto [a, b] : encr) {
      decr[b] = a;
      for(int i = 0; i < 4; i++) {
         if(encr.count(make_pair(a.first + dirx[i], a.second + diry[i])))
            g[b].emplace_back(encr[make_pair(a.first + dirx[i], a.second + diry[i])]);
      }
   }
   
   dfs(0);
   if([&]() {
      for(int i = 0; i < sz(x); i++) if(occ[i] == 0) return 1;
      return 0;
   }()) { return 0; }
   
   map<pii, unordered_set<int>> adj;
   vector<pii> avail[5];
   
   for(int i = 0; i < sz(edges); i++) {
      auto [x1, y1] = decr[edges[i].first];
      auto [x2, y2] = decr[edges[i].second];
      if(x1 == x2) {
         adj[make_pair(x1 + 1, max(y1, y2) - 1)].emplace(i);
         adj[make_pair(x1 - 1, max(y1, y2) - 1)].emplace(i);
      }
      else {
         assert(y1 == y2);
         adj[make_pair(max(x1, x2) - 1, y1 - 1)].emplace(i);
         adj[make_pair(max(x1, x2) - 1, y1 + 1)].emplace(i);
      }
   }
   for(auto [a, b] : adj) { avail[sz(b)].emplace_back(a); }
   
   vector<pii> assoc(sz(edges));
   
   auto get_top = [&]() {
      for(int plane = 1; plane <= 4; plane++) {
         while(avail[plane].size()) {
            auto a = avail[plane].back();
            avail[plane].pop_back();
            if(adj.count(a)) return a;
         }
      }
      assert(false);
   };
   
   
   for(int it = 0; it < sz(edges); it++) {
      auto T = get_top();
      //cerr << T.first << ' ' << T.second << '\t';
      int idx = *adj[T].begin(); 
      //cerr << idx << '\n';
      {         
         auto [x1, y1] = decr[edges[idx].first];
         auto [x2, y2] = decr[edges[idx].second];
         if(x1 == x2) {
            auto _1 = make_pair(x1 - 1, max(y1, y2) - 1), _2 = make_pair(x1 + 1, max(y1, y2) - 1);
            adj[_1].erase(idx);
            adj[_2].erase(idx);
            avail[sz(adj[_1])].emplace_back(_1);
            avail[sz(adj[_2])].emplace_back(_2);
         }
         else {
            assert(y1 == y2);
            auto _1 = make_pair(max(x1, x2) - 1, y1 + 1), _2 = make_pair(max(x1, x2) - 1, y1 - 1);
            adj[_1].erase(idx);
            adj[_2].erase(idx);
            avail[sz(adj[_1])].emplace_back(_1);
            avail[sz(adj[_2])].emplace_back(_2);
         }
      }
      
      adj.erase(T);
      assoc[idx] = T;
   }
   
   auto [yi, er] = unravel(edges);
   auto [san, si] = unravel(assoc);
   build(yi, er, san, si);
   return 1;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 4952 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 5104 KB Output is correct
8 Correct 3 ms 4956 KB Output is correct
9 Correct 459 ms 91916 KB Output is correct
10 Correct 31 ms 13656 KB Output is correct
11 Correct 181 ms 52180 KB Output is correct
12 Correct 48 ms 18200 KB Output is correct
13 Correct 41 ms 16236 KB Output is correct
14 Correct 3 ms 5212 KB Output is correct
15 Correct 4 ms 5468 KB Output is correct
16 Correct 419 ms 87948 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 4952 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 5104 KB Output is correct
8 Correct 3 ms 4956 KB Output is correct
9 Correct 459 ms 91916 KB Output is correct
10 Correct 31 ms 13656 KB Output is correct
11 Correct 181 ms 52180 KB Output is correct
12 Correct 48 ms 18200 KB Output is correct
13 Correct 41 ms 16236 KB Output is correct
14 Correct 3 ms 5212 KB Output is correct
15 Correct 4 ms 5468 KB Output is correct
16 Correct 419 ms 87948 KB Output is correct
17 Correct 2 ms 4952 KB Output is correct
18 Correct 2 ms 5140 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4956 KB Output is correct
21 Correct 2 ms 4956 KB Output is correct
22 Correct 2 ms 4956 KB Output is correct
23 Correct 940 ms 121628 KB Output is correct
24 Correct 2 ms 4956 KB Output is correct
25 Correct 5 ms 5724 KB Output is correct
26 Correct 5 ms 5720 KB Output is correct
27 Correct 5 ms 5724 KB Output is correct
28 Correct 293 ms 52604 KB Output is correct
29 Correct 458 ms 73668 KB Output is correct
30 Correct 692 ms 99012 KB Output is correct
31 Correct 954 ms 119740 KB Output is correct
32 Correct 2 ms 4952 KB Output is correct
33 Correct 2 ms 5208 KB Output is correct
34 Correct 2 ms 4956 KB Output is correct
35 Correct 2 ms 4956 KB Output is correct
36 Correct 2 ms 4956 KB Output is correct
37 Correct 3 ms 4952 KB Output is correct
38 Correct 2 ms 4956 KB Output is correct
39 Correct 2 ms 4956 KB Output is correct
40 Correct 2 ms 5136 KB Output is correct
41 Correct 3 ms 4956 KB Output is correct
42 Correct 2 ms 4956 KB Output is correct
43 Correct 4 ms 5468 KB Output is correct
44 Correct 5 ms 5720 KB Output is correct
45 Runtime error 280 ms 138748 KB Execution killed with signal 11
46 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 4952 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 5104 KB Output is correct
8 Correct 3 ms 4956 KB Output is correct
9 Correct 459 ms 91916 KB Output is correct
10 Correct 31 ms 13656 KB Output is correct
11 Correct 181 ms 52180 KB Output is correct
12 Correct 48 ms 18200 KB Output is correct
13 Correct 41 ms 16236 KB Output is correct
14 Correct 3 ms 5212 KB Output is correct
15 Correct 4 ms 5468 KB Output is correct
16 Correct 419 ms 87948 KB Output is correct
17 Correct 2 ms 4952 KB Output is correct
18 Correct 2 ms 5140 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4956 KB Output is correct
21 Correct 2 ms 4956 KB Output is correct
22 Correct 2 ms 4956 KB Output is correct
23 Correct 940 ms 121628 KB Output is correct
24 Correct 2 ms 4956 KB Output is correct
25 Correct 5 ms 5724 KB Output is correct
26 Correct 5 ms 5720 KB Output is correct
27 Correct 5 ms 5724 KB Output is correct
28 Correct 293 ms 52604 KB Output is correct
29 Correct 458 ms 73668 KB Output is correct
30 Correct 692 ms 99012 KB Output is correct
31 Correct 954 ms 119740 KB Output is correct
32 Correct 2 ms 4952 KB Output is correct
33 Correct 2 ms 5208 KB Output is correct
34 Correct 2 ms 4956 KB Output is correct
35 Correct 2 ms 4956 KB Output is correct
36 Correct 2 ms 4956 KB Output is correct
37 Correct 3 ms 4952 KB Output is correct
38 Correct 2 ms 4956 KB Output is correct
39 Correct 2 ms 4956 KB Output is correct
40 Correct 2 ms 5136 KB Output is correct
41 Correct 3 ms 4956 KB Output is correct
42 Correct 2 ms 4956 KB Output is correct
43 Correct 4 ms 5468 KB Output is correct
44 Correct 5 ms 5720 KB Output is correct
45 Runtime error 280 ms 138748 KB Execution killed with signal 11
46 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 4952 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 5104 KB Output is correct
8 Correct 3 ms 4956 KB Output is correct
9 Correct 459 ms 91916 KB Output is correct
10 Correct 31 ms 13656 KB Output is correct
11 Correct 181 ms 52180 KB Output is correct
12 Correct 48 ms 18200 KB Output is correct
13 Correct 41 ms 16236 KB Output is correct
14 Correct 3 ms 5212 KB Output is correct
15 Correct 4 ms 5468 KB Output is correct
16 Correct 419 ms 87948 KB Output is correct
17 Correct 3 ms 4952 KB Output is correct
18 Correct 2 ms 4952 KB Output is correct
19 Correct 3 ms 4956 KB Output is correct
20 Correct 800 ms 122768 KB Output is correct
21 Runtime error 825 ms 237640 KB Execution killed with signal 11
22 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 4952 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 5104 KB Output is correct
8 Correct 3 ms 4956 KB Output is correct
9 Correct 459 ms 91916 KB Output is correct
10 Correct 31 ms 13656 KB Output is correct
11 Correct 181 ms 52180 KB Output is correct
12 Correct 48 ms 18200 KB Output is correct
13 Correct 41 ms 16236 KB Output is correct
14 Correct 3 ms 5212 KB Output is correct
15 Correct 4 ms 5468 KB Output is correct
16 Correct 419 ms 87948 KB Output is correct
17 Runtime error 883 ms 341060 KB Execution killed with signal 11
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 4952 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 5104 KB Output is correct
8 Correct 3 ms 4956 KB Output is correct
9 Correct 459 ms 91916 KB Output is correct
10 Correct 31 ms 13656 KB Output is correct
11 Correct 181 ms 52180 KB Output is correct
12 Correct 48 ms 18200 KB Output is correct
13 Correct 41 ms 16236 KB Output is correct
14 Correct 3 ms 5212 KB Output is correct
15 Correct 4 ms 5468 KB Output is correct
16 Correct 419 ms 87948 KB Output is correct
17 Correct 2 ms 4952 KB Output is correct
18 Correct 2 ms 5140 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4956 KB Output is correct
21 Correct 2 ms 4956 KB Output is correct
22 Correct 2 ms 4956 KB Output is correct
23 Correct 940 ms 121628 KB Output is correct
24 Correct 2 ms 4956 KB Output is correct
25 Correct 5 ms 5724 KB Output is correct
26 Correct 5 ms 5720 KB Output is correct
27 Correct 5 ms 5724 KB Output is correct
28 Correct 293 ms 52604 KB Output is correct
29 Correct 458 ms 73668 KB Output is correct
30 Correct 692 ms 99012 KB Output is correct
31 Correct 954 ms 119740 KB Output is correct
32 Correct 2 ms 4952 KB Output is correct
33 Correct 2 ms 5208 KB Output is correct
34 Correct 2 ms 4956 KB Output is correct
35 Correct 2 ms 4956 KB Output is correct
36 Correct 2 ms 4956 KB Output is correct
37 Correct 3 ms 4952 KB Output is correct
38 Correct 2 ms 4956 KB Output is correct
39 Correct 2 ms 4956 KB Output is correct
40 Correct 2 ms 5136 KB Output is correct
41 Correct 3 ms 4956 KB Output is correct
42 Correct 2 ms 4956 KB Output is correct
43 Correct 4 ms 5468 KB Output is correct
44 Correct 5 ms 5720 KB Output is correct
45 Runtime error 280 ms 138748 KB Execution killed with signal 11
46 Halted 0 ms 0 KB -