Submission #1109084

#	Time	Username	Problem	Language	Result	Execution time	Memory
1109084		12345678	COVID tests (CEOI24_covid)	C++17	10 / 100	43 ms	592 KiB

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;
string base="";
bool test_students(string a) {
    cout<<"Q "<<a<<endl;
    cout.flush();
    fflush(stdout);
    char answer;
    cin>>answer;
    return answer == 'P';
}
 
int T;
int answer[1001+10];
void solve(int l,int r){
    if(l==r)return void(answer[l]=1);
    int mid=l+(r-l)/2;
    string g=base;
    for(int i=l;i<=mid;i++)g[i]='1';
    if(test_students(g))solve(l,mid);
    for(int i=l;i<=mid;i++)g[i]='0';
    for(int i=mid+1;i<=r;i++)g[i]='1';
    if(test_students(g))solve(mid+1,r);
}
int main() {
    scanf("%d %lf %d", &N, &P, &T);
    for(int i=0;i<N;i++)base+='0';
    for (int i = 0; i < T; i++){
        for(int j=0;j<N;j++)answer[j]=0;
        solve(0,N-1);
        std::string answer_str(N, ' ');
        for (int j = 0; j < N; j++)
            answer_str[j] = answer[j] ? '1' : '0';
        cout<<"A "<<answer_str<<'\n';
        cout.flush();
        fflush(stdout);
        char verdict;
        cin>>verdict;
      	exit(0);
    }
    return 0;
}

Compilation message (stderr)

Main.cpp:36:40: warning: bad option '-funroll-lopps' to pragma 'optimize' [-Wpragmas]
   36 | #pragma GCC optimize ("03,unroll-lopps")
      |                                        ^
Main.cpp:45:28: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   45 | bool test_students(string a) {
      |                            ^
Main.cpp:56:23: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   56 | void solve(int l,int r){
      |                       ^
Main.cpp:66:10: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   66 | int main() {
      |          ^
Main.cpp: In function 'int main()':
Main.cpp:67:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |     scanf("%d %lf %d", &N, &P, &T);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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