Submission #204552

#	Time	Username	Problem	Language	Result	Execution time	Memory
204552		medk	Combo (IOI18_combo)	C++14	0 / 100	1 ms	200 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"

#define pb push_back
#define ll long long
#define x first
#define y second

using namespace std;

string guess_sequence(int n)
{
    string ret="";
    string c[3];
    int gt=press("AB");
    if(gt)
    {
        gt=press("A");
        if(gt) ret+="A", c[0]="B", c[1]="X", c[2]="Y";
        else ret+="B", c[0]="A", c[1]="X", c[2]="Y";
    }
    else
    {
        gt=press("X");
        if(gt) ret+="X", c[0]="A", c[1]="B", c[2]="Y";
        else ret+="Y", c[0]="A", c[1]="X", c[2]="B";
    }
    if(n==1) return ret;
    for(int i=1;i<n;i++)
    {
        gt=press(ret+c[0]+c[0]+ret+c[0]+c[1]+ret+c[0]+c[2]+ret+c[1]);
        if(gt==i) ret+=c[2];
        else if(gt==i+1) ret+=c[1];
        else ret+=c[0];
    }
    gt=press(ret+c[0]);
    if(gt==n) return ret+c[0];
    else
    {
        gt=press(ret+c[1]);
        if(gt==n) return ret+c[1];
        return ret+c[2];
    }
}

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