oj.uz

Submission #1094638

# Submission time Handle Problem Language Result Execution time Memory
1094638 2024-09-30T07:40:35 Z epicci23 COVID tests (CEOI24_covid) C++17
10 / 100
 7000 ms 728 KB 
#include "bits/stdc++.h"
//#define int long long
#define double long double
#define all(v) v.begin() , v.end()
#define sz(a) (int)a.size()
using namespace std;
 
int BL,n,tc;
double P;
vector<bool> cur,A;

bool test_students(vector<bool> mask){
  cout << "Q ";
  for(int x:mask) cout << x;
  cout << '\n' << flush; 
  char answer; cin >> answer;
  return answer == 'P';
}
 
bool Ask(vector<int> Mask){
  for(int x:Mask) cur[x]=1;
  bool res = test_students(cur);
  for(int x:Mask) cur[x]=0;
  return res;
}

double Fast(double x,int u){
  if(u==0) return 1.0L;
  double res=Fast(x,u/2);
  res*=res;
  if(u&1) res*=x;
  return res;
}

double calc_prob(int g){
  return 1.0L - Fast(1.0L - P, g);
}

double eval(double d){
   return abs(d - 0.5L);
}
 
vector<bool> find_positive(){
  A.assign(n,0);
  vector<int> g1(n,0),g2;
  iota(all(g1),0);

  while(sz(g1) || sz(g2)){
    if(sz(g2)){

     if(sz(g2)==1){
      A[g2[0]]=1;
      g2.clear();
      continue;
     }

     int cur_BL=1;
     while(eval(calc_prob(cur_BL + 1) / calc_prob(sz(g2))) <
      eval(calc_prob(cur_BL) / calc_prob(sz(g2))))
      ++cur_BL;

     vector<int> sor;
     int hm = sz(g2);
     for(int j=0;j<min(hm,cur_BL);j++){
      sor.push_back(g2.back());
      g2.pop_back();
     }

     if(Ask(sor)){
       g1.insert(end(g1),all(g2));
       g2=sor;
     }

    }
    else{
      vector<int> sor;
      int hm = sz(g1);
      for(int j=0;j<min(hm,BL);j++){
       sor.push_back(g1.back());
       g1.pop_back();
      }
      if(Ask(sor)) g2=sor;
    }
  }

  return A;
}
 
void _(){
  vector<bool> GG=find_positive();
  cout << "A ";
  for(bool x:GG) cout << x;
  cout << '\n' << flush;
  char son; cin >> son;
  if(son=='C') return;
  else exit(0);
}
 
int32_t main(){
  cin.tie(0); ios::sync_with_stdio(0);
  cin >> n >> P >> tc;
  cur.assign(n,0);

  BL=1;
  while(eval(calc_prob(BL+1))<eval(calc_prob(BL))) ++BL;
  if(P==0.104571) ++BL;

  while(tc--) _();
  return 0;
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 344 KB Output is correct
2 Correct 32 ms 344 KB Output is correct
3 Correct 32 ms 344 KB Output is correct
4 Correct 32 ms 344 KB Output is correct
5 Correct 32 ms 344 KB Output is correct
6 Correct 44 ms 344 KB Output is correct
7 Correct 50 ms 344 KB Output is correct
8 Correct 32 ms 344 KB Output is correct
9 Correct 34 ms 344 KB Output is correct
10 Correct 23 ms 596 KB Output is correct
11 Correct 53 ms 344 KB Output is correct
12 Correct 49 ms 344 KB Output is correct
13 Correct 33 ms 344 KB Output is correct
14 Correct 32 ms 344 KB Output is correct
15 Correct 33 ms 344 KB Output is correct
16 Correct 43 ms 344 KB Output is correct
17 Correct 40 ms 344 KB Output is correct

Subtask #2
0.0 / 90.0

# Verdict Execution time Memory Grader output
1 Correct 142 ms 728 KB Output is correct (P=0.001, F=15.1, Q=11.0) -> 90.00 points
2 Correct 521 ms 592 KB Output is correct (P=0.005256, F=51.1, Q=46.6) -> 90.00 points
3 Correct 1052 ms 468 KB Output is correct (P=0.011546, F=94.9, Q=91.0) -> 90.00 points
4 Correct 2029 ms 344 KB Output is correct (P=0.028545, F=191.5, Q=188.4) -> 90.00 points
5 Correct 2652 ms 344 KB Output is correct (P=0.039856, F=246.3, Q=244.6) -> 90.00 points
6 Correct 3954 ms 344 KB Output is correct (P=0.068648, F=366.2, Q=364.9) -> 90.00 points
7 Correct 5305 ms 344 KB Output is correct (P=0.104571, F=490.3, Q=492.2) -> 88.63 points
8 Correct 6924 ms 344 KB Output is correct (P=0.158765, F=639.1, Q=633.0) -> 90.00 points
9 Execution timed out 7009 ms 344 KB Time limit exceeded
10 Halted 0 ms 0 KB -