oj.uz

Submission #1094602

# Submission time Handle Problem Language Result Execution time Memory
1094602 2024-09-30T06:10:31 Z epicci23 COVID tests (CEOI24_covid) C++17
10 / 100
 7000 ms 596 KB 
#include "bits/stdc++.h"
//#define int long long
#define all(v) v.begin() , v.end()
#define sz(a) (int)a.size()
using namespace std;

mt19937 rng(time(nullptr));

int BL,n,tc=1;
double p;
vector<bool> A;
vector<int> ar;

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

void update_block(int rem){
  int l=1,r=rem;
  while(l<r){
    int mid=(l+r+1)/2;
    if(fast_pow(p,mid)>=0.5) l=mid;
    else r=mid-1;
  }
  BL=l;
}

bool test_students(vector<bool> mask){
	cout << "Q ";
  for(int x:mask) cout << x;
  cout << endl << flush; 
  char answer; cin >> answer;
  return answer == 'P';
}

bool ask_range(int l,int r){
  vector<bool> cur(n,0);
  for(int i=l;i<=r;i++) cur[ar[i]]=1;
  return test_students(cur);
}

int find_first(int l,int r){
  if(l==r) return l;
  int m=(l+r)/2;
  if(ask_range(l,m)) return find_first(l,m);
  return find_first(
    m+1,r);
}

vector<bool> find_positive(){
	A.assign(n,0);
  for(int i=0;i<n;){
    update_block(n-i);
    if(!ask_range(i,i+BL-1)){
      i+=BL;
      continue;
    }
    int lmao = find_first(i,i+BL-1);
    A[ar[lmao]]=1;
    i=lmao+1;
  }
  return A;
}

void _(){
  vector<bool> GG=find_positive();
  cout << "A ";
  for(bool x:GG) cout << x;
  cout << endl << 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;
  p=1.0-p;
  update_block(n);
  ar.assign(n,0);
  iota(all(ar),0LL);
  shuffle(all(ar),rng);
  while(tc--) _();
  return 0;
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 344 KB Output is correct
2 Correct 45 ms 344 KB Output is correct
3 Correct 30 ms 344 KB Output is correct
4 Correct 38 ms 596 KB Output is correct
5 Correct 32 ms 344 KB Output is correct
6 Correct 32 ms 344 KB Output is correct
7 Correct 39 ms 344 KB Output is correct
8 Correct 35 ms 344 KB Output is correct
9 Correct 51 ms 344 KB Output is correct
10 Correct 20 ms 344 KB Output is correct
11 Correct 47 ms 352 KB Output is correct
12 Correct 30 ms 352 KB Output is correct
13 Correct 42 ms 504 KB Output is correct
14 Correct 30 ms 352 KB Output is correct
15 Correct 30 ms 352 KB Output is correct
16 Correct 32 ms 352 KB Output is correct
17 Correct 0 ms 344 KB Output is correct

Subtask #2
0.0 / 90.0

# Verdict Execution time Memory Grader output
1 Correct 124 ms 344 KB Output is correct (P=0.001, F=15.1, Q=10.9) -> 90.00 points
2 Correct 519 ms 344 KB Output is correct (P=0.005256, F=51.1, Q=46.6) -> 90.00 points
3 Correct 1002 ms 344 KB Output is correct (P=0.011546, F=94.9, Q=91.0) -> 90.00 points
4 Correct 2049 ms 344 KB Output is correct (P=0.028545, F=191.5, Q=190.8) -> 90.00 points
5 Correct 2619 ms 344 KB Output is correct (P=0.039856, F=246.3, Q=246.4) -> 89.85 points
6 Correct 3993 ms 344 KB Output is correct (P=0.068648, F=366.2, Q=372.5) -> 84.21 points
7 Correct 5220 ms 344 KB Output is correct (P=0.104571, F=490.3, Q=500.0) -> 83.40 points
8 Correct 6524 ms 344 KB Output is correct (P=0.158765, F=639.1, Q=632.9) -> 90.00 points
9 Execution timed out 7039 ms 344 KB Time limit exceeded
10 Halted 0 ms 0 KB -