oj.uz

Submission #120092

# Submission time Handle Problem Language Result Execution time Memory
120092 2019-06-23T09:36:44 Z nvmdava Parachute rings (IOI12_rings) C++17
37 / 100
 3608 ms 248560 KB 
#include <bits/stdc++.h>
using namespace std;

int N;
int p[1000005];
int cyc = 0;
set<int> adj[1000005];
set<int> pos, t;
int find(int v){
   if(v == p[v]) return v;
   return p[v] = find(p[v]);
}
bool merge(int v, int u){
   v = find(v);
   u = find(u);
   if(v == u) return 1;
   p[v] = u;
   return 0;
}
void Init(int N_) {
   N = N_;
   for(int i = 0; i < N; i++){
      p[i] = i;
      pos.insert(i);
   }
}
bool in[1000005];
int lol, q;
int dfs(int v){
   if(pos.count(v))
      t.insert(v);
   if(lol != v && adj[v].count(q)){
      return 1;
   }
   for(int x : adj[v]){
      if(!in[x]){
         in[x] = 1;
         if(dfs(x) == 1) return 1;
      }
   }
   if(t.count(v))
      t.erase(v);
   return 0;
}

void Link(int v, int u) {
   if(pos.empty()) return;
   adj[v].insert(u);
   adj[u].insert(v);
   if(adj[v].size() > 3){
      if(pos.count(v)){
         pos = {v};
      } else {
         pos.clear();
      }
   } else if(adj[v].size() == 3){
      for(int x : adj[v]){
         if(pos.count(x)) t.insert(x);
      }
      if(pos.count(v)) t.insert(v);
      swap(pos, t);
      t.clear();
   }
   if(adj[u].size() > 3){
      if(pos.count(u)){
         pos = {u};
      } else {
         pos.clear();
      }
   } else if(adj[u].size() == 3){
      for(int x : adj[u]){
         if(pos.count(x)) t.insert(x);
      }
      if(pos.count(u)) t.insert(u);
      swap(pos, t);
      t.clear();
   }
   if(merge(v, u) == 0) return;
   cyc++;
   if(cyc >= 3){
      pos.clear();
      return;
   }
   memset(in, 0, sizeof in);
   if(pos.count(v))
      t.insert(v);
   if(pos.count(u))
      t.insert(u);
   lol = u;
   q = v;
   in[v] = 1;
   in[u] = 1;
   dfs(u);
   swap(t, pos);
   t.clear();
}

int CountCritical() {
  return pos.size();
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 47352 KB Output is correct
2 Correct 44 ms 47736 KB Output is correct
3 Correct 46 ms 47864 KB Output is correct
4 Correct 42 ms 48384 KB Output is correct
5 Correct 45 ms 49016 KB Output is correct
6 Correct 47 ms 49408 KB Output is correct
7 Correct 41 ms 47608 KB Output is correct
8 Correct 45 ms 49144 KB Output is correct
9 Correct 45 ms 47864 KB Output is correct
10 Correct 44 ms 47864 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 767 ms 129292 KB Output is correct
2 Correct 1511 ms 136196 KB Output is correct
3 Correct 595 ms 111736 KB Output is correct
4 Correct 1833 ms 206340 KB Output is correct
5 Correct 2033 ms 208368 KB Output is correct
6 Correct 3608 ms 248560 KB Output is correct
7 Correct 580 ms 111096 KB Output is correct
8 Correct 1719 ms 167548 KB Output is correct
9 Correct 1891 ms 189648 KB Output is correct
10 Correct 1359 ms 200696 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 47352 KB Output is correct
2 Correct 44 ms 47736 KB Output is correct
3 Correct 46 ms 47864 KB Output is correct
4 Correct 42 ms 48384 KB Output is correct
5 Correct 45 ms 49016 KB Output is correct
6 Correct 47 ms 49408 KB Output is correct
7 Correct 41 ms 47608 KB Output is correct
8 Correct 45 ms 49144 KB Output is correct
9 Correct 45 ms 47864 KB Output is correct
10 Correct 44 ms 47864 KB Output is correct
11 Correct 48 ms 48760 KB Output is correct
12 Correct 62 ms 49764 KB Output is correct
13 Correct 53 ms 49500 KB Output is correct
14 Incorrect 49 ms 48888 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 47352 KB Output is correct
2 Correct 44 ms 47736 KB Output is correct
3 Correct 46 ms 47864 KB Output is correct
4 Correct 42 ms 48384 KB Output is correct
5 Correct 45 ms 49016 KB Output is correct
6 Correct 47 ms 49408 KB Output is correct
7 Correct 41 ms 47608 KB Output is correct
8 Correct 45 ms 49144 KB Output is correct
9 Correct 45 ms 47864 KB Output is correct
10 Correct 44 ms 47864 KB Output is correct
11 Correct 48 ms 48760 KB Output is correct
12 Correct 62 ms 49764 KB Output is correct
13 Correct 53 ms 49500 KB Output is correct
14 Incorrect 49 ms 48888 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 47352 KB Output is correct
2 Correct 44 ms 47736 KB Output is correct
3 Correct 46 ms 47864 KB Output is correct
4 Correct 42 ms 48384 KB Output is correct
5 Correct 45 ms 49016 KB Output is correct
6 Correct 47 ms 49408 KB Output is correct
7 Correct 41 ms 47608 KB Output is correct
8 Correct 45 ms 49144 KB Output is correct
9 Correct 45 ms 47864 KB Output is correct
10 Correct 44 ms 47864 KB Output is correct
11 Correct 767 ms 129292 KB Output is correct
12 Correct 1511 ms 136196 KB Output is correct
13 Correct 595 ms 111736 KB Output is correct
14 Correct 1833 ms 206340 KB Output is correct
15 Correct 2033 ms 208368 KB Output is correct
16 Correct 3608 ms 248560 KB Output is correct
17 Correct 580 ms 111096 KB Output is correct
18 Correct 1719 ms 167548 KB Output is correct
19 Correct 1891 ms 189648 KB Output is correct
20 Correct 1359 ms 200696 KB Output is correct
21 Correct 48 ms 48760 KB Output is correct
22 Correct 62 ms 49764 KB Output is correct
23 Correct 53 ms 49500 KB Output is correct
24 Incorrect 49 ms 48888 KB Output isn't correct
25 Halted 0 ms 0 KB -