Submission #417899

#	Time	Username	Problem	Language	Result	Execution time	Memory
417899		LouayFarah	Combo (IOI18_combo)	C++14	0 / 100	1 ms	200 KiB

combo

#include "bits/stdc++.h"
#include "combo.h"
using namespace std;
 
#define pb push_back
 
int press(string p);
 
string guess_sequence(int n)
{
    string res = "";
    string temp = "ABXY";
    for(int i = 0; i<3; i++)
    {
        string tr = "";
        tr.pb(temp[i]);
        if(press(tr)==1)
        {
            res.pb(temp[i]);
            break;
        }
    }
    if(res.length()==0)
        res.pb('Y');
 
    string used = "";
    for(int i = 0; i<4; i++)
    {
        if(res[0]==temp[i])
            continue;
        used.pb(temp[i]);
    }
 
    for(int i = 2; i<=n; i++)
    {
        string s = "";
        s = s + res + used[0];
        s = s + res + used[1] + used[0];
        s = s + res + used[1] + used[1];
        s = s + res + used[1] + used[2];
 
        int k = press(s);
        if(k==(int)res.length())
            res.pb(used[2]);
        if(k==(int)res.length() + 1)
            res.pb(used[0]);
        if(k==(int)res.length()+2)
            res.pb(used[1]);
    }
 
    if((int)res.length()!=n)
    {
        string t = res + used[0];
        if(press(t)==n)
        {
            res = res + used[0];
            return res;
        }
        t = res + used[1];
        if(press(t)==n)
        {
            res = res + used[1];
            return res;
        }
 
        res = res + used[2];
        return res;
    }
    return res;
}

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