Submission #479488

#	Time	Username	Problem	Language	Result	Execution time	Memory
479488		gnahz	Combo (IOI18_combo)	C++14	0 / 100	84 ms	200 KiB

combo

#include "bits/stdc++.h"
#include "combo.h"
using namespace std;

string guess_sequence(int N){
    string ret = "";
    char exc, arr[4] = {'A', 'B', 'X', 'Y'};
    if (press("A") == 1){
        ret = "A"; exc = 'A';
    }
    else if (press("B") == 1){
        ret = "B"; exc = 'B';
    }
    else if (press("X") == 1){
        ret = "X"; exc = 'X';
    }
    else {
        ret = "Y"; exc = 'Y';
    }
    int cnt = 2;
    while ((int)ret.size() < N){
        for (int i = 0; i < 4; i++){
            if (arr[i] != exc){
                string temp = ret;
                temp += arr[i];
                if (press(temp) == cnt){
                    cnt++;
                    break;
                }
            }
        }
    }
    return ret;
}

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