Submission #129869

#	Time	Username	Problem	Language	Result	Execution time	Memory
129869		miguel	Combo (IOI18_combo)	C++14	5 / 100	3 ms	2040 KiB

combo

#include<bits/stdc++.h>
#include <combo.h>
using namespace std;
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define dbg(x) cout << #x << '=' << x << '\n';
#define ll long long
#define sz size()
#define x first
#define y second
#define pi pair <int, int>
#define pii pair <int, pi>
#define vi vector <int>
const ll mod = 1e9 + 7;

string guess_sequence(int n){
    string s="";
    vector <string> ch={"A", "B", "X", "Y"};
    if(press("A")) s="A";
    else if(press("B")) s="B";
    else if(press("X")) s="X";
    else s="Y";
   // cout<<s<<endl;
    vector <string> use;
    for(int i=0; i<=3; i++) if(ch[i]!=s) use.pb(ch[i]);
    //for(string i: use) cout<<"x"<<i<<endl;
    for(int i=1; i<n-1; i++){
        string xd=s+use[0]+s+use[1]+use[0]+s+use[1]+use[1]+s+use[1]+use[2];
       // cout<<s<<" "<<xd;//<<endl;
        int q=press(xd); //cout<<" "<<q<<endl;
        if(q-2==i) s=s+use[1];
        else if(q-1==i) s=s+use[0];
        else s=s+use[2];
        //cout<<s<<endl;
    }//cout<<s<<endl;
    int q=press(s+use[0]+s+use[1]);
    if(q==n-1){
        s+=use[2];
    }
    else{
        q=press(s+use[0]);
        if(q==n-1) s+=use[1];
        else (s+=use[0]);
    }
  return s;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95