oj.uz

Submission #1038047

# Submission time Handle Problem Language Result Execution time Memory
1038047 2024-07-29T12:28:14 Z ttamx COVID tests (CEOI24_covid) C++17
0 / 100
 7 ms 344 KB 
#include <bits/stdc++.h>

using namespace std;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int n,t,k;
double p;
string ans;

int ask(int l,int r){
    string s(n,'0');
    for(int i=l;i<=r;i++)s[i]='1';
    cout << "Q " << s << endl;
    char res;
    cin >> res;
    return res=='P';
}

void solve(int l,int r){
    if(l==r)return void(ans[l]='1');
    int m=(l+r)/2;
    bool found=false;
    if(rng()&1){
        if(ask(l,m)){
            solve(l,m);
            found=true;
        }
        if(!found&&ask(m+1,r)){
            solve(m+1,r);
        }
    }else{
        if(ask(m+1,r)){
            solve(m+1,r);
            found=true;
        }
        if(!found&&ask(l,m)){
            solve(l,m);
        }
    }
}

void runcase(){
    ans=string(n,'0');
    for(int l=0,r=k-1;l<n;l+=k,r+=k){
        r=min(r,n-1);
        if(ask(l,r))solve(l,r);
    }
    cout << "A " << ans << endl;
    string s;
    cin >> s;
}

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n >> p >> t;
    double q=1-p,r=q;
    k=1;
    while(r>0.5&&k<n){
        r*=q;
        k++;
    }
    while(t--)runcase();
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB translate:wrong
2 Halted 0 ms 0 KB -

Subtask #1
0.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 344 KB Output is correct
2 Correct 7 ms 344 KB Output is correct
3 Correct 4 ms 344 KB Output is correct
4 Correct 4 ms 344 KB Output is correct
5 Correct 4 ms 344 KB Output is correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 4 ms 344 KB Output is correct
8 Incorrect 4 ms 344 KB translate:wrong
9 Halted 0 ms 0 KB -

Subtask #2
0.0 / 90.0

# Verdict Execution time Memory Grader output
1 Runtime error 0 ms 344 KB Execution killed with signal 13
2 Halted 0 ms 0 KB -