Submission #1211318

#	Time	Username	Problem	Language	Result	Execution time	Memory
1211318		lukasuliashvili	Combo (IOI18_combo)	C++20	0 / 100	0 ms	408 KiB

combo

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

string guess_sequence(int N) {
    string all = "ABXY";
    string p;

    // Safely guess the first character
    for (char c : all) {
        if (press(string(1, c)) == 1) {
            p += c;
            break;
        }
    }

    // Assign the other 3 letters
    string rest;
    for (char c : all) {
        if (c != p[0]) rest += c;
    }

    string fix1 = string(1, rest[0]);
    string fix2 = string(1, rest[1]);
    string fix3 = string(1, rest[2]);

    // Loop to guess remaining characters
    while (p.size() < N) {
        string q = p + fix1 + p + fix2 + fix3 + p + fix2 + fix1 + p + fix2 + fix2;
        int res = press(q);
        if (res == p.size()) {
            p += fix3;
        } else if (res == p.size() + 1) {
            p += fix1;
        } else {
            p += fix2;
        }
    }

    return p;
}

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