Submission #1044391

#	Time	Username	Problem	Language	Result	Execution time	Memory
1044391		CyberCow	COVID tests (CEOI24_covid)	C++17	52.52 / 100	5248 ms	596 KiB

Main

#include <cassert>
#include <cstdio>
#include <string>
#include <vector>
#include <iostream>
using namespace std;

int N;
double P;

inline bool test_students(int &l, int &r) {
    cout << "Q ";
    for (int i = 0; i < l; i++)
    {
        cout << '0';
    }
    for (int i = l; i <= r; i++)
    {
        cout << '1';
    }
    for (int i = r + 1; i < N; i++)
    {
        cout << '0';
    }
    cout << endl;
    char c;
    cin >> c;
    if (c == 'P')
        return 1;
    return 0;
}

vector<bool> answer;

inline void recus(int l, int r, int st)
{
    if (l == r)
    {
        if(test_students(l, r))
        {
            answer[l] = 1;
        }
    }
    else
    {
        int m = (l + r) / 2;
        int hm = test_students(l, m);
        if (hm == 0)
        {
            if (st == 0)
            {
                m++;
                hm = test_students(m, r);
                m--;
                if (hm == 1)
                {
                    if (m + 1 == r)
                    {
                        answer[r] = 1;
                    }
                    else
                    {
                        recus(m + 1, r, 1);
                    }
                }
            }
            else
            {
                if (m + 1 == r)
                {
                    answer[r] = 1;
                }
                else
                {
                    recus(m + 1, r, 1);
                }
            }
        }
        else
        {
            if (l != m)
                recus(l, m, 1);
            else
            {
                answer[l] = 1;
            }
            m++;
            hm = test_students(m, r);
            m--;
            if (hm == 1)
            {
                if (m + 1 != r)
                {
                    recus(m + 1, r, st);
                }
                else
                {
                    answer[m + 1] = 1;
                }
            }
        }
    }
}


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int T;
    cin >> N >> P >> T;
    vector<bool>zro;
    for (int i = 0; i < N; i++)
    {
        zro.push_back(0);
    }
    for (int i = 0; i < T; i++) {
        answer = zro;
        int intervalboooom = N / 2;
        for (int j = 0; j < N; j+=intervalboooom)
        {
            recus(j, min(j + intervalboooom - 1, N - 1), 0);
        }
        cout << "A ";
        for (int i = 0; i < answer.size(); i++)
        {
            cout << answer[i];
        }
        cout << endl;
        char c;
        cin >> c;
    }
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:124:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<bool>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  124 |         for (int i = 0; i < answer.size(); i++)
      |                         ~~^~~~~~~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 10 / 10
• Subtask 2: 42.519999996 / 90