Submission #906520

#	Time	Username	Problem	Language	Result	Execution time	Memory
906520		Andrei_ierdnA	Combo (IOI18_combo)	C++17	100 / 100	13 ms	1996 KiB

combo

#include "combo.h"
#include <cstring>
#include <string>

using namespace std;

string guess_sequence(int n)
{
    string guess;
    string available;
    int rez;
    // first character
    rez = press("AB");
    if (rez >= 1) {
        rez = press("A");
        if (rez) {
            guess.push_back('A');
            available = "BXY";
        }
        else {
            guess.push_back('B');
            available = "AXY";
        }
    }
    else {
        rez = press("X");
        if (rez) {
            guess.push_back('X');
            available = "ABY";
        }
        else {
            guess.push_back('Y');
            available = "ABX";
        }
    }
    if (n == 1) {
        return guess;
    }
    // contained characters
    for (int i = 2; i < n; i++) {
        string aux;
        aux = guess + available[0];
        for (int j = 0; j <= 2; j++) {
            aux = aux + guess + available[1] + available[j];
        }
        rez = press(aux) - i + 1;
        if (rez == 1) {
            guess.push_back(available[0]);
        }
        else if (rez == 2) {
            guess.push_back(available[1]);
        }
        else {
            guess.push_back(available[2]);
        }
    }
    // end character
    rez = press(guess + available[0]);
    if (rez == n) {
        return guess + available[0];
    }
    rez = press(guess + available[1]);
    if (rez == n) {
        return guess + available[1];
    }
    return guess + available[2];
}

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