oj.uz

Submission #143289

# Submission time Handle Problem Language Result Execution time Memory
143289 2019-08-13T14:08:34 Z tpoppo Split the Attractions (IOI19_split) C++14
18 / 100
 2000 ms 16248 KB 
#include "split.h"
#include<bits/stdc++.h>
#define lsb(x) (x&(-x))

using namespace std;
const int MAXN = 2e5 + 100;

using pii = pair<int,int>;
pii ord[3];
vector<int> res;

vector<int> grafo[MAXN];
vector<pii> edge;
int n;
mt19937 rng(3213123);

int parent[MAXN];
int find(int id){
  if(parent[id] == id) return id;
  return parent[id] = find(parent[id]);
}
bool merge(int a,int b){
  a = find(a);
  b = find(b);
  if(a == b) return false;
  parent[a] = b;
  return true;
}


void random_st(){
  for(int i=0;i<n;i++){
    grafo[i].clear();
    parent[i] = i;
  }
  shuffle(edge.begin(),edge.end(),rng);
  for(auto el : edge){
    //cout<<el.first<<" "<<el.second<<endl;
    if(merge(el.first,el.second)){
      grafo[el.first].emplace_back(el.second);
      grafo[el.second].emplace_back(el.first);
    }
  }
}

int block;
int req;
int rval;
int rid;
int dfs(int id,int prev){
  //cout<<prev<<" => "<<id<<endl;
  if(id == block) return 0;
  int sum = 1;
  for(auto el : grafo[id]){
    if(el != prev){
      sum += dfs(el,id);
    }
  }
  if(sum >= req && sum < rval){
    rval = sum;
    rid = id;
  }
  return sum;
}


int p1,p2;

void f(int id,int prev,int stato){
  if(id == p1) stato = 1;
  if(id == p2) stato = 2;
  switch(stato){
  case 1:
    if(ord[0].first){
      ord[0].first--;
      res[id] = ord[0].second;
    }
    break;
  case 2:
    if(ord[1].first){
      ord[1].first--;
      res[id] = ord[1].second;
    }
    break;
  }
  for(auto el : grafo[id]){
    if(el != prev){
      f(el,id,stato);
    }
  }
}




vector<int> find_split(int n, int a, int b, int c, vector<int> p, vector<int> q) {


  res.resize(n);
  ::n = n;
  ord[0] = {a, 1};
  ord[1] = {b, 2};
  ord[2] = {c, 3};
  sort(ord,ord + 3);
  edge.reserve(p.size());
  for(int i=0;i<p.size();i++){
    edge.emplace_back(p[i],q[i]);
  }
  for(int _=0;_<100;_++){

    random_st();
    int root = rng()%n;
    rval = rid = 1e9;
    block = -1;
    req = ord[0].first;
    dfs(root,-1);
    //cout<<rid<<" - "<<rval<<endl;
    if(rval == 1e9) continue;
    p1 = rid;
    rval = rid = 1e9;
    block = p1;
    req = ord[1].first;
    dfs(root,-1);
    //cout<<rid<<" - "<<rval<<endl;
    p2 = rid;
    //cout<<root<<" "<<p1<<" "<<p2<<endl;
    if(p2 != 1e9){

      f(root,-1,0);
      for(auto&el:res){
        if(!el) el = ord[2].second;
      }
      return res;
    }
  }
	return res;
}

Compilation message

split.cpp: In function 'std::vector<int> find_split(int, int, int, int, std::vector<int>, std::vector<int>)':
split.cpp:106:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<p.size();i++){
               ~^~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4984 KB ok, correct split
2 Correct 6 ms 4984 KB ok, correct split
3 Correct 6 ms 4984 KB ok, correct split
4 Correct 6 ms 4984 KB ok, correct split
5 Correct 6 ms 4988 KB ok, correct split
6 Correct 6 ms 4984 KB ok, correct split
7 Correct 114 ms 16248 KB ok, correct split
8 Correct 133 ms 16232 KB ok, correct split
9 Correct 232 ms 15096 KB ok, correct split
10 Correct 141 ms 16120 KB ok, correct split
11 Correct 121 ms 15992 KB ok, correct split

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4984 KB ok, correct split
2 Correct 6 ms 4984 KB ok, correct split
3 Correct 6 ms 4984 KB ok, correct split
4 Correct 128 ms 12924 KB ok, correct split
5 Correct 105 ms 11896 KB ok, correct split
6 Correct 116 ms 16248 KB ok, correct split
7 Correct 130 ms 15732 KB ok, correct split
8 Correct 145 ms 13944 KB ok, correct split
9 Correct 135 ms 11932 KB ok, correct split
10 Correct 70 ms 12016 KB ok, correct split
11 Correct 71 ms 12272 KB ok, correct split
12 Correct 74 ms 12144 KB ok, correct split

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4984 KB ok, correct split
2 Correct 107 ms 11780 KB ok, correct split
3 Correct 40 ms 7800 KB ok, correct split
4 Correct 6 ms 5032 KB ok, correct split
5 Correct 127 ms 13372 KB ok, correct split
6 Correct 121 ms 13432 KB ok, correct split
7 Correct 180 ms 13944 KB ok, correct split
8 Correct 138 ms 13432 KB ok, correct split
9 Correct 198 ms 13432 KB ok, correct split
10 Correct 596 ms 7416 KB ok, no valid answer
11 Correct 976 ms 8456 KB ok, no valid answer
12 Execution timed out 2072 ms 11764 KB Time limit exceeded
13 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4984 KB ok, correct split
2 Correct 6 ms 4984 KB ok, no valid answer
3 Correct 7 ms 4984 KB ok, correct split
4 Correct 6 ms 4984 KB ok, correct split
5 Correct 6 ms 4984 KB ok, correct split
6 Correct 6 ms 4984 KB ok, correct split
7 Correct 8 ms 4984 KB ok, correct split
8 Correct 6 ms 4984 KB ok, correct split
9 Correct 8 ms 5244 KB ok, correct split
10 Correct 9 ms 5240 KB ok, correct split
11 Correct 6 ms 5112 KB ok, correct split
12 Incorrect 47 ms 5240 KB jury found a solution, contestant did not
13 Halted 0 ms 0 KB -

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4984 KB ok, correct split
2 Correct 6 ms 4984 KB ok, correct split
3 Correct 6 ms 4984 KB ok, correct split
4 Correct 6 ms 4984 KB ok, correct split
5 Correct 6 ms 4988 KB ok, correct split
6 Correct 6 ms 4984 KB ok, correct split
7 Correct 114 ms 16248 KB ok, correct split
8 Correct 133 ms 16232 KB ok, correct split
9 Correct 232 ms 15096 KB ok, correct split
10 Correct 141 ms 16120 KB ok, correct split
11 Correct 121 ms 15992 KB ok, correct split
12 Correct 6 ms 4984 KB ok, correct split
13 Correct 6 ms 4984 KB ok, correct split
14 Correct 6 ms 4984 KB ok, correct split
15 Correct 128 ms 12924 KB ok, correct split
16 Correct 105 ms 11896 KB ok, correct split
17 Correct 116 ms 16248 KB ok, correct split
18 Correct 130 ms 15732 KB ok, correct split
19 Correct 145 ms 13944 KB ok, correct split
20 Correct 135 ms 11932 KB ok, correct split
21 Correct 70 ms 12016 KB ok, correct split
22 Correct 71 ms 12272 KB ok, correct split
23 Correct 74 ms 12144 KB ok, correct split
24 Correct 6 ms 4984 KB ok, correct split
25 Correct 107 ms 11780 KB ok, correct split
26 Correct 40 ms 7800 KB ok, correct split
27 Correct 6 ms 5032 KB ok, correct split
28 Correct 127 ms 13372 KB ok, correct split
29 Correct 121 ms 13432 KB ok, correct split
30 Correct 180 ms 13944 KB ok, correct split
31 Correct 138 ms 13432 KB ok, correct split
32 Correct 198 ms 13432 KB ok, correct split
33 Correct 596 ms 7416 KB ok, no valid answer
34 Correct 976 ms 8456 KB ok, no valid answer
35 Execution timed out 2072 ms 11764 KB Time limit exceeded
36 Halted 0 ms 0 KB -