Submission #1109403

#	Time	Username	Problem	Language	Result	Execution time	Memory
1109403		8pete8	COVID tests (CEOI24_covid)	C++17	10 / 100	4793 ms	720 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")
int N;
double P;
string ra;
string base="";
bool test_students(vector<int>mask){
    for(auto i:mask)base[i]='1';
    cout<<"Q "<<base<<endl;
    cout.flush();
    char answer;
    scanf(" %c", &answer);
    for(auto i:mask)base[i]='0';
    return answer == 'P';
}
int T;
int answer[1001+10];
vector<int>qry;
void solve(int ql,int qr){
    int l=ql,r=qr;
    while(l<=qr){
        r=qr;
        int pos=N;
        while(l<=r){
            int mid=l+(r-l)/2;
            for(int j=l;j<=mid;j++)qry.pb(j);
            if(test_students(qry))pos=min(pos,mid),r=mid-1;
            else l=mid+1;
            qry.clear();
        }
        if(pos==N)return;
        l=pos+1;
        answer[pos]=1;
    }
}
void find_positive(int gap){
    for(int j=0;(j*gap)<N;j++){
        solve(j*gap,min(N-1,(j*gap)+gap-1));
    }
}
int main() {
    scanf("%d %lf %d", &N, &P, &T);
    for(int j=0;j<N;j++)base+='0';
    for (int i = 0; i < T; i++) {
        for(int j=0;j<N;j++)answer[j]=0;
        int gap;
        if(T==1)gap=1;
        else if(P==0.001)gap=500;
        else if(P==0.005256)gap=125;
        else if(P==0.011546)gap=59;
        else if(P==0.028545)gap=25;
        else if(P==0.039856)gap=17;
        else if(P==0.068648)gap=10;
        else if (P==0.104571)gap=7;
        else if(P==0.158765)gap=4;
        else if(P==0.2)gap=4;
        else assert(0);
        find_positive(gap);
        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 (stderr)

Main.cpp:36:40: warning: bad option '-funroll-lopps' to pragma 'optimize' [-Wpragmas]
   36 | #pragma GCC optimize ("03,unroll-lopps")
      |                                        ^
Main.cpp:41:35: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   41 | bool test_students(vector<int>mask){
      |                                   ^
Main.cpp:53:25: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   53 | void solve(int ql,int qr){
      |                         ^
Main.cpp:70:27: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   70 | void find_positive(int gap){
      |                           ^
Main.cpp:75:10: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   75 | int main() {
      |          ^
Main.cpp: In function 'bool test_students(std::vector<int>)':
Main.cpp:46:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |     scanf(" %c", &answer);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:76:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |     scanf("%d %lf %d", &N, &P, &T);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:99:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   99 |         scanf(" %c", &verdict);
      |         ~~~~~^~~~~~~~~~~~~~~~~

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