Submission #1108796

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1108796	2024-11-05T06:25:24 Z	8pete8	COVID tests (CEOI24_covid)	C++17	Compilation error	0 ms	0 KB

Main

#include <cassert>
#include <cstdio>
#include <string>
#include <vector>
#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<cassert>
#include<unordered_map>
#include <queue>
#include <cstdint>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include <iomanip>
#include<numeric>
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define s second
#define pii pair<int,int>
#define ppii pair<int,pii>
#define vi vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-lopps")
/// You may use:

// The number of students
int N;

// The probability any given student is positive
double P;

// This function performs a test on a subset of samples.
// Its argument is a vector of Booleans of length N,
// where the i-th element is true if the i-th sample should be added to the mix.
// It returns true if (and only if) at least one of the samples in the mix is positive.
bool test_students(std::vector<bool> mask) {
    assert(mask.size() == (size_t)N);

    std::string mask_str(N, ' ');
    for (int i = 0; i < N; i++)
        mask_str[i] = mask[i] ? '1' : '0';

    printf("Q %s\n", mask_str.c_str());
    fflush(stdout);

    char answer;
    scanf(" %c", &answer);
    return answer == 'P';
}

/// You should implement:

// This function will be called once for each test instance.
// It should use test_students to determine which samples are positive.
// It must return a vector of Booleans of length N,
// where the i-th element is true if and only if the i-th sample is positive.
std::vector<bool> find_positive() {
    std::vector<bool> answer(N);
    for(int i=0;i<N;i++){
        vector<bool>qry(N,0);
        qry[i]=1;
        ans[i]=test_students(qry);
    }
    return answer;
}

int main() {
    int T;
    scanf("%d %lf %d", &N, &P, &T);

    // You may perform any extra initialization here.

    for (int i = 0; i < T; i++) {
        std::vector<bool> answer = find_positive();
        assert(answer.size() == (size_t)N);

        std::string answer_str(N, ' ');
        for (int j = 0; j < N; j++)
            answer_str[j] = answer[j] ? '1' : '0';

        printf("A %s\n", answer_str.c_str());
        fflush(stdout);

        char verdict;
        scanf(" %c", &verdict);
        if (verdict == 'W')
            exit(0);
    }

    return 0;
}

Compilation message

Main.cpp:36:40: warning: bad option '-funroll-lopps' to pragma 'optimize' [-Wpragmas]
   36 | #pragma GCC optimize ("03,unroll-lopps")
      |                                        ^
Main.cpp:49:42: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   49 | bool test_students(std::vector<bool> mask) {
      |                                          ^
Main.cpp:70:33: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   70 | std::vector<bool> find_positive() {
      |                                 ^
Main.cpp: In function 'std::vector<bool> find_positive()':
Main.cpp:75:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   75 |         ans[i]=test_students(qry);
      |         ^~~
      |         abs
Main.cpp: At global scope:
Main.cpp:80:10: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   80 | int main() {
      |          ^
Main.cpp: In function 'bool test_students(std::vector<bool>)':
Main.cpp:60:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |     scanf(" %c", &answer);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:82:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |     scanf("%d %lf %d", &N, &P, &T);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:98:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   98 |         scanf(" %c", &verdict);
      |         ~~~~~^~~~~~~~~~~~~~~~~