Submission #1044230

#	Time	Username	Problem	Language	Result	Execution time	Memory
1044230		CyberCow	COVID tests (CEOI24_covid)	C++17	0 / 100	68 ms	588 KiB

Main

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

int N;
double P;

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;
}

void find_positive(vector<bool> v) {
    cout << "A ";
    for (int i = 0; i < v.size(); i++)
    {
        cout << v[i];
    }
    cout << endl;
    char c;
    cin >> c;
}

vector<bool> answer;

void recus(int l, int r)
{
    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 (m + 1 != r)
                recus(m + 1, r);
            else
            {
                answer[m + 1] = 1;
            }
        }
        else
        {
            if (l != m)
                recus(l, m);
            else
            {
                answer[l] = 1;
            }
            hm = test_students(m + 1, r);
            if (hm == 1)
            {
                if (m + 1 != r)
                {
                    recus(m + 1, r);
                }
                else
                {
                    answer[m + 1] = 1;
                }
            }
        }
    }
}


int main() {
    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;
        recus(0, N - 1);
        find_positive(answer);
    }
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void find_positive(std::vector<bool>)':
Main.cpp:35:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<bool>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |     for (int i = 0; i < v.size(); i++)
      |                     ~~^~~~~~~~~~

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