Submission #203847

#	Time	Username	Problem	Language	Result	Execution time	Memory
203847		0649803068	Combo (IOI18_combo)	C++11	0 / 100	2 ms	200 KiB

combo

#include <combo.h>
using namespace std;
string guess_sequence(int n)
{
    char a, b, c, d;
    string s="";
    int k=press("AB");
    if(k)
    {
        k=press("A");
        if(k){
            a='A';
            b='B';
            c='X';
            d='Y';
        }
        else
        {
            a='B';
            b='A';
            c='X';
            d='Y';
        }
    }
    else
    {
        k=press("Y");
        if(k)
        {
            a='Y';
            b='B';
            c='X';
            d='A';
        }
        else
        {
            a='X';
            b='B';
            c='A';
            d='Y';
        }
    }
    s+=a;
    int l=1;
    while(l<n)
    {
        k=press(s+b+s+c+c+s+c+b+s+c+d);
        if(k==l)
            s+=d;
        if(k==l+1)
            s+=b;
        if(k==l+2)
            s+=c;
        l++;
    }
   return s; 
}

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