oj.uz

Submission #1038718

# Submission time Handle Problem Language Result Execution time Memory
1038718 2024-07-30T06:46:48 Z Warinchai COVID tests (CEOI24_covid) C++14
0 / 100
 18 ms 344 KB 
#include<bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC target("avx2")
using namespace std;
int n,t;
double p;
int use=0;
int ask(string v){
    //use++;
    cout<<"Q ";
    cout<<v;
    cout<<endl;
    //cerr<<"input:"<<endl;
    char ans;
    cin>>ans;
    //cerr<<ans<<endl;
    return ans=='P'?1:0;
}
string temp;
string ans;
void fans(int st,int en){
    //cerr<<st<<" "<<en<<endl;
    if(st==en){
        temp[st]='1';
        ans[st]=ask(temp)?'1':'0';
        temp[st]='0';
        return;
    }
    if(st>en)return;
    int m=(st+en)/2;
    for(int i=st;i<=m;i++)temp[i]='1';
    bool tans;tans=ask(temp);
    for(int i=st;i<=m;i++)temp[i]='0';
    if(tans){
        if(st==m)ans[st]='1';
        else fans(st,m);

        for(int i=m+1;i<=en;i++)temp[i]='1';
        tans=ask(temp);
        for(int i=m+1;i<=en;i++)temp[i]='0';
        if(tans){
            if(m+1==en)ans[en]='1';
            else fans(m+1,en);
        }
    }else{
        if(m+1==en)ans[en]='1';
        else fans(m+1,en);
    }
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin>>n>>p>>t;
    temp=string(n,'0');
    while(t--){
        //cerr<<"work"<<endl;
        ans=string(n,'0');
        use=0;

        int prob=max(1,(int)p*n);
        if(p!=0.001)prob+=2;
        int div=n/prob;

        for(int i=1;i<prob;i++){
            string t(n,'0');
            for(int j=div*(i-1);j<=div*i-1;j++)t[j]=1;
            if(div*i-1==div*(i-1)||ask(t))fans(div*(i-1),div*i-1);
            for(int j=div*(i-1);j<=div*i-1;j++)t[j]=0;
        }
        string temp(n,'0');
        for(int j=div*(prob-1);j<=n-1;j++)temp[j]='1';
        if(div*(prob-1)==n-1||ask(temp))fans(div*(prob-1),n-1);
        //cout<<"prob:"<<prob<<endl;
        /*for(int i=1;i<=prob;i++){
            string t(n,'0');
            for(int j=div*(i-1);j<=(i==prob?n-1:div*i-1);j++)t[j]=1;
            if(ask(t))fans(div*(i-1),i==prob?n-1:div*i-1);
        }
        //fans(0,n-1);*/
        cout<<"A ";
        cout<<ans;
        cout<<endl;
        char res;
        cin>>res;
        //cerr<<"use:"<<use<<endl;
        if(res=='W')break;
    }
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Runtime error 0 ms 344 KB Execution killed with signal 13
2 Halted 0 ms 0 KB -

Subtask #1
0.0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 344 KB Execution killed with signal 13
2 Halted 0 ms 0 KB -

Subtask #2
0.0 / 90.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 344 KB Output is correct (P=0.001, F=15.1, Q=13.9) -> 90.00 points
2 Runtime error 0 ms 344 KB Execution killed with signal 13
3 Halted 0 ms 0 KB -