oj.uz

Submission #1058263

# Submission time Handle Problem Language Result Execution time Memory
1058263 2024-08-14T09:09:07 Z mychecksedad Rarest Insects (IOI22_insects) C++17
57.29 / 100
 101 ms 1096 KB 
#include "insects.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define en cout << '\n'
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define vi vector<int>
#define ff first
#define ss second
const int N = 1e5+10;


mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int r(int l, int r){
  return uniform_int_distribution<int>(l, r)(rng);
}
vector<bool> used(N);
vector<int> v;
int n;
int test(int x){
  move_inside(x);
  int last_car = 1;
  vector<int> in;
  in.pb(x);
  for(int i =0 ; i < n; ++i){
    if(!used[v[i]]){
      move_inside(v[i]);
      int car = press_button();
      if(car == last_car){
        move_outside(v[i]);
      }else{
        in.pb(v[i]);
        used[v[i]] = 1;
        last_car++;
      }
    }
  }
  for(int x: in) move_outside(x);
    // cout << x << ' ' << last_car << '\n';
  return last_car;
}
int uniq;
bool is_big(int k){
  int co = 0, tot = 0;
  vi in;
  for(int i = 0; i < n; ++i){
    if(!used[v[i]]){
      tot++;
      move_inside(v[i]);
      co++;
      int car = press_button();
      in.pb(v[i]);
      if(car > k){
        move_outside(v[i]);
        in.pop_back();
        --co;
      }
      // cout << car << ' ' << v[i] << ' ' << k << '\n';
    }
  }
  for(int x: in) move_outside(x);
  // cout << co << ' ' << uniq << ' ' << k << '\n';
  if(k * uniq == co){
    return 1;
  }
  return 0;
}
int min_cardinality(int nn) { n=nn;
  
  for(int i = 0; i < n; ++i) v.pb(i);
  for(int i = 1; i < n; ++i) swap(v[i], v[r(0, i)]); 

  int last_car = 1;
  move_inside(v[0]);
  vector<int> a;
  a.pb(v[0]);
  for(int i = 1; i < n; ++i){
    move_inside(v[i]);
    v.pb(v[i]);
    int car = press_button();
    a.pb(v[i]);
    if(car > 1){
      move_outside(v[i]);
      a.pop_back();
    }
    // cout << i << endl;
  }
  uniq = a.size();
  if(a.size() <= 7){
    int ans = n;
    for(int c: a) used[c] = 1;
    for(int c: a) move_outside(c);
    for(int c: a){
      ans = min(ans, test(c));
    }
    return ans;
  }
  if(a.size() > n/2){
    return 1;
  }
  for(int c: a) used[c] = 1;
  // for(int x: a) cout << x << ' ';
  // cout << "wtf";
  for(int c: a) move_outside(c);
  int l = 0, r = (n - int(a.size())) / a.size(); int ans = r;
  while(l <= r){
    int m = l+r>>1;
    if(is_big(m)){
      // cout << m << ' ';
      ans = m;
      l = m + 1;
    }else{
      r = m - 1;
    }
  }
  return ans + 1;
}

Compilation message

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:99:15: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   99 |   if(a.size() > n/2){
      |      ~~~~~~~~~^~~~~
insects.cpp:108:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  108 |     int m = l+r>>1;
      |             ~^~
insects.cpp:74:7: warning: unused variable 'last_car' [-Wunused-variable]
   74 |   int last_car = 1;
      |       ^~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 3 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 2 ms 344 KB Output is correct
9 Correct 3 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 2 ms 344 KB Output is correct
13 Correct 6 ms 344 KB Output is correct
14 Correct 2 ms 344 KB Output is correct
15 Correct 4 ms 344 KB Output is correct
16 Correct 2 ms 344 KB Output is correct
17 Correct 6 ms 344 KB Output is correct
18 Correct 3 ms 344 KB Output is correct
19 Correct 3 ms 344 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 2 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 3 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 2 ms 344 KB Output is correct
9 Correct 3 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 2 ms 344 KB Output is correct
13 Correct 6 ms 344 KB Output is correct
14 Correct 2 ms 344 KB Output is correct
15 Correct 4 ms 344 KB Output is correct
16 Correct 2 ms 344 KB Output is correct
17 Correct 6 ms 344 KB Output is correct
18 Correct 3 ms 344 KB Output is correct
19 Correct 3 ms 344 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 2 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 11 ms 464 KB Output is correct
24 Correct 4 ms 344 KB Output is correct
25 Correct 44 ms 444 KB Output is correct
26 Correct 18 ms 464 KB Output is correct
27 Correct 8 ms 464 KB Output is correct
28 Correct 5 ms 344 KB Output is correct
29 Correct 15 ms 344 KB Output is correct
30 Correct 24 ms 344 KB Output is correct
31 Correct 17 ms 344 KB Output is correct
32 Correct 31 ms 460 KB Output is correct
33 Correct 31 ms 344 KB Output is correct
34 Correct 26 ms 344 KB Output is correct
35 Correct 30 ms 440 KB Output is correct
36 Correct 22 ms 344 KB Output is correct
37 Correct 22 ms 444 KB Output is correct
38 Correct 25 ms 344 KB Output is correct
39 Correct 11 ms 344 KB Output is correct
40 Correct 10 ms 344 KB Output is correct
41 Correct 5 ms 600 KB Output is correct

Subtask #3
32.29 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 13 ms 480 KB Output is correct
8 Correct 9 ms 856 KB Output is correct
9 Partially correct 77 ms 712 KB Output is partially correct
10 Partially correct 69 ms 716 KB Output is partially correct
11 Correct 10 ms 344 KB Output is correct
12 Correct 20 ms 476 KB Output is correct
13 Partially correct 30 ms 344 KB Output is partially correct
14 Partially correct 51 ms 344 KB Output is partially correct
15 Partially correct 30 ms 344 KB Output is partially correct
16 Partially correct 94 ms 704 KB Output is partially correct
17 Partially correct 101 ms 456 KB Output is partially correct
18 Partially correct 77 ms 572 KB Output is partially correct
19 Partially correct 81 ms 940 KB Output is partially correct
20 Partially correct 85 ms 456 KB Output is partially correct
21 Partially correct 60 ms 704 KB Output is partially correct
22 Partially correct 34 ms 344 KB Output is partially correct
23 Partially correct 30 ms 600 KB Output is partially correct
24 Correct 19 ms 476 KB Output is correct
25 Correct 19 ms 472 KB Output is correct
26 Correct 8 ms 600 KB Output is correct
27 Partially correct 64 ms 712 KB Output is partially correct
28 Partially correct 68 ms 476 KB Output is partially correct
29 Partially correct 97 ms 708 KB Output is partially correct
30 Partially correct 85 ms 716 KB Output is partially correct
31 Partially correct 59 ms 1096 KB Output is partially correct
32 Partially correct 52 ms 344 KB Output is partially correct
33 Partially correct 48 ms 344 KB Output is partially correct
34 Partially correct 49 ms 344 KB Output is partially correct
35 Partially correct 68 ms 464 KB Output is partially correct
36 Partially correct 73 ms 704 KB Output is partially correct
37 Partially correct 54 ms 712 KB Output is partially correct
38 Partially correct 48 ms 344 KB Output is partially correct
39 Partially correct 45 ms 464 KB Output is partially correct
40 Partially correct 51 ms 592 KB Output is partially correct
41 Partially correct 72 ms 708 KB Output is partially correct
42 Partially correct 52 ms 464 KB Output is partially correct
43 Correct 5 ms 456 KB Output is correct
44 Correct 17 ms 480 KB Output is correct
45 Correct 25 ms 452 KB Output is correct
46 Correct 20 ms 476 KB Output is correct
47 Correct 14 ms 344 KB Output is correct
48 Correct 13 ms 484 KB Output is correct