Submission #1071374

#	Time	Username	Problem	Language	Result	Execution time	Memory
1071374		jer033	COVID tests (CEOI24_covid)	C++17	10 / 100	7050 ms	344 KiB

Main

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

vector<bool> answer(1000, 0);

void answer_clear()
{
    for (int i=0; i<1000; i++)
        answer[i] = 0;
}

bool ask_query(vector<bool> a)
{
    cout << "Q ";
    for (int i=0; i<1000; i++)
        cout << a[i];
    cout << '\n';
    cout.flush();
    char x;
    cin >> x;
    if (x=='P')
        return 1;
    return 0;
}

bool ask_query2(int x, int y)
{
    cout << "Q ";
    for (int i=0; i<x; i++)
        cout << 0;
    for (int i=x; i<=y; i++)
        cout << 1;
    for (int i=y+1; i<1000; i++)
        cout << 0;
    cout << '\n';
    cout.flush();
    char k;
    cin >> k;
    if (k=='P')
        return 1;
    return 0;
}

bool report(vector<bool> a)
{
    cout << "A ";
    for (int i=0; i<1000; i++)
        cout << a[i];
    cout << '\n';
    cout.flush();
    char x;
    cin >> x;
    if (x=='C')
        return 1;
    return 0;
}

bool range_query(int x, int y)
{
    bool response = ask_query2(x, y);
    if (response==1)
    {
        if (x==y)
            answer[x] = 1;
        else
        {
            int z = (x+y)/2;
            range_query(x, z);
            range_query(z+1, y);
        }
        return 1;
    }
    return 0;
}

int main()
{
    int N, T;
    long double P;
    cin >> N >> P >> T;
    if ((T==1) or (P > 0.10))
    {
        while (T--)
        {
            vector<bool> query(N, 0);
            vector<bool> ans(N, 0);
            for (int i=0; i<N; i++)
            {
                query[i] = 1;
                ans[i] = ask_query(query);
                query[i] = 0;
            }
            bool L = report(ans);
            if (L==0)
                T = 0;
        }
    }
    else
    {
        while (T--)
        {
            answer_clear();
            if (P < 0.01)
                range_query(0, 999);
            else if (P < 0.05)
            {
                for (int i=1; i<=10; i++)
                    range_query(100*i-100, 100*i-1);
            }
            else if (P < 0.11)
            {
                for (int i=1; i<=50; i++)
                    range_query(20*i-20, 20*i-1);
            }
            else
            {
                for (int i=1; i<=100; i++)
                    range_query(10*i-10, 10*i-1);
            }
            bool L = report(answer);
            if (L==0)
                T = 0;
        }
    }
}

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