Submission #713275

#	Time	Username	Problem	Language	Result	Execution time	Memory
713275		europium	Combo (IOI18_combo)	C++17	88 / 100	34 ms	636 KiB

combo

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <numeric>
#include <cmath>
#include <iterator>
#include <set>
#include <map>
#include <math.h>
#include <iomanip>
#include <unordered_set>
#include "combo.h"
using namespace std;

string guess_sequence(int n) {
    vector<string> moves = {"A", "B", "X", "Y"};

    string s = "";

    for (int i = 0; i < 4; i++){
        string guess = moves[i];

        if (press(guess) == 1){
            s += moves[i];

            auto it = find(moves.begin(), moves.end(), guess);
            moves.erase(it);
            break;
        }
    }

    while (int(s.size()) < n - 1){
        string guess = s + moves[0] + s + moves[1] + moves[0] + s + moves[1] + moves[1] + s + moves[1] + moves[2];
        int coins = press(guess);

        if (coins == int(s.size())) s += moves[2];
        else if (coins == int(s.size()) + 1) s += moves[0];
        else if (coins == int(s.size()) + 2) s += moves[1];
    }

    for (int i = 0; i < 3; i++){
        string guess = s + moves[i];

        if (press(guess) == int(s.size()) + 1){
            s += moves[i];
            break;
        }
    }

    return s;
}

• Subtask 1: 5 / 5
• Subtask 2: 83 / 95