oj.uz

Submission #780702

# Submission time Handle Problem Language Result Execution time Memory
780702 2023-07-12T11:52:43 Z vjudge1 Simurgh (IOI17_simurgh) C++17
51 / 100
 83 ms 5640 KB 
#include <bits/stdc++.h>
#include "simurgh.h"

#define all(x) (x).begin(),(x).end()
using namespace std;

//#define ask count_common_roads 

using ll = long long;
using ld = long double;

//#define int ll
#define sz(x) ((int)(x).size())

using pii = pair<int,int>;
using tii = tuple<int,int,int>;

const int nmax = 500;

vector<pii> g[nmax];
vector<int> occ;
vector<int> candr;
int flag;

int cnt = 0;
int ask(vector<int> r) {
  return count_common_roads(r);
}

void dfs(int x) {
  occ[x] = flag;
  for(auto [y, ptr] : g[x]) {
    if(occ[y] != 0) continue;
    //cerr << x << ' ' << y << '\t' << ptr << '\n';
    occ[y] = flag;
    candr.emplace_back(ptr);
    dfs(y);
  }
  return;
}

int mat[nmax][nmax];
  vector<int> isgood;
  vector<int> checked;

void solvefori(int i) {
  fill(all(occ), 0);
  candr.clear();
  occ[i] = -1;
  vector<vector<int>> atrs;
  atrs.emplace_back();
  vector<int> nv;
  flag = 0;
  for(auto [x, ptr] : g[i]) {
    if(occ[x] == 0) {
      flag++;
      dfs(x);
      nv.emplace_back(ptr);
      atrs.emplace_back();
      atrs.back().emplace_back(ptr);
    }
    else
      atrs[occ[x]].emplace_back(ptr);
  }
  
  int startmn = sz(candr) - 1;
  copy(all(nv), back_inserter(candr));
  
  for(int i = 1; i <= flag; i++) {
    //cerr << "--\n";
    vector<int> rez;
    int mx = -1; 
    for(int j = 0; j < sz(atrs[i]); j++) {
      int u = atrs[i][j];
      candr[startmn + i] = u;
      if(checked[u] && isgood[u]) { mx = ask(candr); break; }
    }
    for(int j = 0; j < sz(atrs[i]); j++) {
      int u = atrs[i][j];
      candr[startmn + i] = u;
      if(!checked[u])
        rez.emplace_back(ask(candr));
      else
        rez.emplace_back(-1);
    }
    if(mx == -1)
      mx = *max_element(all(rez));
    for(int j = 0; j < sz(atrs[i]); j++) {
      checked[atrs[i][j]] = 1;
      if(rez[j] == mx)
        isgood[atrs[i][j]] = 1;
    }
  }
}

vector<int> S4(int n, vector<int> u, vector<int> v) {
  for(int i = 0; i < sz(u); i++) {
    mat[u[i]][v[i]] = i;
    mat[v[i]][u[i]] = i;
    
    g[u[i]].emplace_back(v[i], i);
    g[v[i]].emplace_back(u[i], i);
  }
  
  //cerr << "yura\n";
  solvefori(0);
  for(int j = 1; j < n; j++) checked[mat[j][0]] = 1;
  for(int i = 1; i < n; i++) {
    vector<int> crr;
    for(int j = 0; j < n; j++) {
      if(j == i) continue;
      crr.emplace_back(mat[i][j]);
    }
    int totaltf = ask(crr);
    for(int j = 0; j < i; j++)
      totaltf -= isgood[mat[i][j]];
    for(int smth = 0; smth < totaltf; smth++) {
      auto trywith = [&](int lim) {
        vector<int> ntwr;
        ntwr.emplace_back(mat[0][i]);
        int expected = isgood[mat[0][i]];
        for(int j = 1; j <= lim; j++) {
          if(j == i) continue;
          ntwr.emplace_back(mat[i][j]);
          if(checked[mat[i][j]]) expected += isgood[mat[i][j]];
        }
        for(int j = lim + 1; j < n; j++) {
          if(j == i) continue;
          ntwr.emplace_back(mat[0][j]);
          if(checked[mat[i][j]]) expected += isgood[mat[i][j]];
        }
        return ask(ntwr) - expected;
      };
      int lim = 0;
      
      for(int i = 9; i >= 0; i--) {
        if(lim + (1 << i) >= n) continue;
        if(trywith(lim + (1 << i)) <= smth) lim += (1 << i);
      }
      lim++;
      checked[mat[i][lim]] = 1;
      isgood[mat[i][lim]] = 1;
    }
    
    for(int j = 0; j < n; j++) {
      if(j == i) continue;
      checked[mat[i][j]] = 1;
    }
      
  }
  vector<int> lst;
  for(int i = 0; i < sz(isgood); i++)
    if(isgood[i])
      lst.emplace_back(i);
  return lst;
}

std::vector<int> find_roads(int n, std::vector<int> u, std::vector<int> v) {
  isgood.resize(sz(u));
  checked.resize(sz(u));
  occ.resize(n);
  if(n > 240)
   return S4(n, u, v);
  for(int i = 0; i < sz(u); i++) {
    g[u[i]].emplace_back(v[i], i);
    g[v[i]].emplace_back(u[i], i);
  }
  
  for(int i = 0; i < n; i++) {
    solvefori(i);
  }
  
  vector<int> lst;
  for(int i = 0; i < sz(isgood); i++)
    if(isgood[i])
      lst.emplace_back(i);
  
  //for(auto x : lst)
    //cerr << x << ' ';
  //cerr << '\n';
  
  return lst;
}



/**
      Anul asta se da centroid.
-- Surse oficiale
*/

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB correct
2 Correct 1 ms 212 KB correct
3 Correct 0 ms 212 KB correct
4 Correct 1 ms 212 KB correct
5 Correct 1 ms 212 KB correct
6 Correct 1 ms 212 KB correct
7 Correct 0 ms 212 KB correct
8 Correct 1 ms 212 KB correct
9 Correct 0 ms 212 KB correct
10 Correct 0 ms 212 KB correct
11 Correct 0 ms 212 KB correct
12 Correct 1 ms 212 KB correct
13 Correct 0 ms 212 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB correct
2 Correct 1 ms 212 KB correct
3 Correct 0 ms 212 KB correct
4 Correct 1 ms 212 KB correct
5 Correct 1 ms 212 KB correct
6 Correct 1 ms 212 KB correct
7 Correct 0 ms 212 KB correct
8 Correct 1 ms 212 KB correct
9 Correct 0 ms 212 KB correct
10 Correct 0 ms 212 KB correct
11 Correct 0 ms 212 KB correct
12 Correct 1 ms 212 KB correct
13 Correct 0 ms 212 KB correct
14 Correct 1 ms 340 KB correct
15 Correct 1 ms 340 KB correct
16 Correct 2 ms 340 KB correct
17 Correct 1 ms 340 KB correct
18 Correct 1 ms 340 KB correct
19 Correct 1 ms 340 KB correct
20 Correct 2 ms 340 KB correct
21 Correct 1 ms 340 KB correct
22 Correct 1 ms 340 KB correct
23 Correct 1 ms 340 KB correct
24 Correct 1 ms 340 KB correct
25 Correct 1 ms 212 KB correct
26 Correct 2 ms 340 KB correct
27 Correct 1 ms 340 KB correct
28 Correct 1 ms 340 KB correct
29 Correct 1 ms 212 KB correct
30 Correct 1 ms 340 KB correct
31 Correct 1 ms 340 KB correct
32 Correct 1 ms 340 KB correct
33 Correct 1 ms 340 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB correct
2 Correct 1 ms 212 KB correct
3 Correct 0 ms 212 KB correct
4 Correct 1 ms 212 KB correct
5 Correct 1 ms 212 KB correct
6 Correct 1 ms 212 KB correct
7 Correct 0 ms 212 KB correct
8 Correct 1 ms 212 KB correct
9 Correct 0 ms 212 KB correct
10 Correct 0 ms 212 KB correct
11 Correct 0 ms 212 KB correct
12 Correct 1 ms 212 KB correct
13 Correct 0 ms 212 KB correct
14 Correct 1 ms 340 KB correct
15 Correct 1 ms 340 KB correct
16 Correct 2 ms 340 KB correct
17 Correct 1 ms 340 KB correct
18 Correct 1 ms 340 KB correct
19 Correct 1 ms 340 KB correct
20 Correct 2 ms 340 KB correct
21 Correct 1 ms 340 KB correct
22 Correct 1 ms 340 KB correct
23 Correct 1 ms 340 KB correct
24 Correct 1 ms 340 KB correct
25 Correct 1 ms 212 KB correct
26 Correct 2 ms 340 KB correct
27 Correct 1 ms 340 KB correct
28 Correct 1 ms 340 KB correct
29 Correct 1 ms 212 KB correct
30 Correct 1 ms 340 KB correct
31 Correct 1 ms 340 KB correct
32 Correct 1 ms 340 KB correct
33 Correct 1 ms 340 KB correct
34 Correct 80 ms 1576 KB correct
35 Correct 79 ms 1544 KB correct
36 Correct 53 ms 1236 KB correct
37 Correct 6 ms 388 KB correct
38 Correct 77 ms 1564 KB correct
39 Correct 74 ms 1448 KB correct
40 Correct 55 ms 1336 KB correct
41 Correct 83 ms 1568 KB correct
42 Correct 82 ms 1492 KB correct
43 Correct 46 ms 1140 KB correct
44 Correct 42 ms 860 KB correct
45 Correct 40 ms 940 KB correct
46 Correct 34 ms 724 KB correct
47 Correct 14 ms 584 KB correct
48 Correct 4 ms 340 KB correct
49 Correct 7 ms 340 KB correct
50 Correct 15 ms 580 KB correct
51 Correct 42 ms 948 KB correct
52 Correct 34 ms 852 KB correct
53 Correct 31 ms 724 KB correct
54 Correct 46 ms 1140 KB correct
55 Correct 42 ms 940 KB correct
56 Correct 43 ms 920 KB correct
57 Correct 41 ms 852 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB correct
2 Correct 0 ms 212 KB correct
3 Incorrect 49 ms 5640 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB correct
2 Correct 1 ms 212 KB correct
3 Correct 0 ms 212 KB correct
4 Correct 1 ms 212 KB correct
5 Correct 1 ms 212 KB correct
6 Correct 1 ms 212 KB correct
7 Correct 0 ms 212 KB correct
8 Correct 1 ms 212 KB correct
9 Correct 0 ms 212 KB correct
10 Correct 0 ms 212 KB correct
11 Correct 0 ms 212 KB correct
12 Correct 1 ms 212 KB correct
13 Correct 0 ms 212 KB correct
14 Correct 1 ms 340 KB correct
15 Correct 1 ms 340 KB correct
16 Correct 2 ms 340 KB correct
17 Correct 1 ms 340 KB correct
18 Correct 1 ms 340 KB correct
19 Correct 1 ms 340 KB correct
20 Correct 2 ms 340 KB correct
21 Correct 1 ms 340 KB correct
22 Correct 1 ms 340 KB correct
23 Correct 1 ms 340 KB correct
24 Correct 1 ms 340 KB correct
25 Correct 1 ms 212 KB correct
26 Correct 2 ms 340 KB correct
27 Correct 1 ms 340 KB correct
28 Correct 1 ms 340 KB correct
29 Correct 1 ms 212 KB correct
30 Correct 1 ms 340 KB correct
31 Correct 1 ms 340 KB correct
32 Correct 1 ms 340 KB correct
33 Correct 1 ms 340 KB correct
34 Correct 80 ms 1576 KB correct
35 Correct 79 ms 1544 KB correct
36 Correct 53 ms 1236 KB correct
37 Correct 6 ms 388 KB correct
38 Correct 77 ms 1564 KB correct
39 Correct 74 ms 1448 KB correct
40 Correct 55 ms 1336 KB correct
41 Correct 83 ms 1568 KB correct
42 Correct 82 ms 1492 KB correct
43 Correct 46 ms 1140 KB correct
44 Correct 42 ms 860 KB correct
45 Correct 40 ms 940 KB correct
46 Correct 34 ms 724 KB correct
47 Correct 14 ms 584 KB correct
48 Correct 4 ms 340 KB correct
49 Correct 7 ms 340 KB correct
50 Correct 15 ms 580 KB correct
51 Correct 42 ms 948 KB correct
52 Correct 34 ms 852 KB correct
53 Correct 31 ms 724 KB correct
54 Correct 46 ms 1140 KB correct
55 Correct 42 ms 940 KB correct
56 Correct 43 ms 920 KB correct
57 Correct 41 ms 852 KB correct
58 Correct 0 ms 212 KB correct
59 Correct 0 ms 212 KB correct
60 Incorrect 49 ms 5640 KB WA in grader: NO
61 Halted 0 ms 0 KB -