Submission #1039312

#	Time	Username	Problem	Language	Result	Execution time	Memory
1039312		Dalek_of_Rivia	COVID tests (CEOI24_covid)	C++17	64.98 / 100	1251 ms	356 KiB

Main

#include <bits/stdc++.h>
using namespace std;

bool ans[1000];
string question;
int N;

bool ask(int inf, int sup, bool preg){
    cin.tie(nullptr);
    ios::sync_with_stdio(0);
    char c='P';
    if(preg){
        cout<<"Q ";
        for(int i=inf; i<=sup; i++){
            question[i]='1';
        }
        cout<<question<<endl;
        for(int i=inf; i<=sup; i++){
            question[i]='0';
        }
        cout.flush();
        cin>>c;
    }
    if(c=='N'){
        for(int i=inf; i<=sup; i++) ans[i]=false;
        return false;
    }else if(inf==sup){
        ans[inf]=true;
        return true;
    }else{
        int m = (inf+sup)/2;
        ask(m+1, sup, ask(inf, m, true));
        return true;
    }
}

int main()
{
    cin.tie(nullptr);
    ios::sync_with_stdio(0);
    int T;
    double P;
    cin>>N>>P>>T;
    double jaskier=0.6;
    for(int i=0; i<1000; i++) question.push_back('0');
    for(int dalekofrivia=0; dalekofrivia<T; dalekofrivia++){
        if(P<0.001) P=0.001;
        int u=0.5+log(jaskier/P)/log(2);
        int lambda=1;
        for(int i=0; i<u; i++) lambda*=2;
        for(int i=0; i<N; i++) question[i]='0';
        for(int i=0; i<N; i=i+lambda) ask(i, min(i+lambda, N)-1, true);
        cout<<"A ";
        for(int i=0; i<N; i++) cout<<ans[i];
        cout<<endl;
        cout.flush();
        char C;
        cin>>C;
        if(C!='C') break;
    }

    return 0;
}

• Subtask 0: 0 / 0
• Subtask 1: 10 / 10
• Subtask 2: 54.980000001 / 90