Submission #1215341

#	Time	Username	Problem	Language	Result	Execution time	Memory
1215341		wazj2024	Combo (IOI18_combo)	C++20	100 / 100	7 ms	484 KiB

combo

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

string guess_sequence(int n) {
    string r;
    if (press("AB") > 0) {
        if (press("A") == 1) r = "A";
        else r = "B";
    } else {
        if (press("X") == 1) r = "X";
        else r = "Y";
    }

    vector<string> Auxiliar;
    if (r == "A") Auxiliar = {"B", "XB", "XX", "XY"};
    else if (r == "B") Auxiliar = {"A", "XA", "XX", "XY"};
    else if (r == "X") Auxiliar = {"A", "BA", "BB", "BY"};
    else if (r == "Y") Auxiliar = {"A", "BA", "BB", "BX"};

    for (int i = 1; i < n - 1; i++) {
        int Valor = press(r + Auxiliar[0] + r + Auxiliar[1] + r + Auxiliar[2] + r + Auxiliar[3]);
        switch (r[0]) {
            case 'A':
                if (Valor == i) r += 'Y';
                else if (Valor == i + 1) r += 'B';
                else if (Valor == i + 2) r += 'X';
                break;
            case 'B':
                if (Valor == i) r += 'Y';
                else if (Valor == i + 1) r += 'A';
                else if (Valor == i + 2) r += 'X';
                break;
            case 'X':
                if (Valor == i) r += 'Y';
                else if (Valor == i + 1) r += 'A';
                else if (Valor == i + 2) r += 'B';
                break;
            case 'Y':
                if (Valor == i) r += 'X';
                else if (Valor == i + 1) r += 'A';
                else if (Valor == i + 2) r += 'B';
                break;
        }
    }

    if (n > 1) {
        if (press(r + "A" + r + "B") == n) {
            if (press(r + "A") == n) r += "A";
            else r += "B";
        } else {
            if (press(r + "X") == n) r += "X";
            else r += "Y";
        }
    }

    return r;
}

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