oj.uz

Submission #1094605

# Submission time Handle Problem Language Result Execution time Memory
1094605 2024-09-30T06:20:05 Z epicci23 COVID tests (CEOI24_covid) C++17
10 / 100
 7000 ms 348 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;

mt19937 rng(time(nullptr));

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

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 l=1,r=n;
  while(l<r){
    int mid=(l+r+1)/2;
    if(fast_pow(p,mid)>=0.5L) l=mid;
    else r=mid-1;
  }
  Store.resize(n+5);
  for(int i=1;i<=n;i++) Store[i]=min(i,l);
}

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_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;){
    BL=Store[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 << '\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;
  p=1.0-p;
  update_block();
  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 1 ms 344 KB Output is correct

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 344 KB Output is correct
2 Correct 31 ms 344 KB Output is correct
3 Correct 32 ms 344 KB Output is correct
4 Correct 38 ms 344 KB Output is correct
5 Correct 32 ms 344 KB Output is correct
6 Correct 36 ms 344 KB Output is correct
7 Correct 37 ms 344 KB Output is correct
8 Correct 52 ms 344 KB Output is correct
9 Correct 35 ms 344 KB Output is correct
10 Correct 22 ms 344 KB Output is correct
11 Correct 32 ms 348 KB Output is correct
12 Correct 31 ms 348 KB Output is correct
13 Correct 31 ms 348 KB Output is correct
14 Correct 31 ms 348 KB Output is correct
15 Correct 40 ms 348 KB Output is correct
16 Correct 48 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct

Subtask #2
0.0 / 90.0

# Verdict Execution time Memory Grader output
1 Correct 141 ms 344 KB Output is correct (P=0.001, F=15.1, Q=11.0) -> 90.00 points
2 Correct 477 ms 340 KB Output is correct (P=0.005256, F=51.1, Q=46.6) -> 90.00 points
3 Correct 1006 ms 340 KB Output is correct (P=0.011546, F=94.9, Q=91.0) -> 90.00 points
4 Correct 2093 ms 344 KB Output is correct (P=0.028545, F=191.5, Q=190.6) -> 90.00 points
5 Correct 2697 ms 344 KB Output is correct (P=0.039856, F=246.3, Q=246.8) -> 89.28 points
6 Correct 3947 ms 344 KB Output is correct (P=0.068648, F=366.2, Q=372.5) -> 84.21 points
7 Correct 5287 ms 344 KB Output is correct (P=0.104571, F=490.3, Q=499.5) -> 83.72 points
8 Correct 6748 ms 344 KB Output is correct (P=0.158765, F=639.1, Q=633.3) -> 90.00 points
9 Execution timed out 7045 ms 344 KB Time limit exceeded
10 Halted 0 ms 0 KB -