Submission #523425

#	Time	Username	Problem	Language	Result	Execution time	Memory
523425		dron_rp	Combo (IOI18_combo)	C++14	10 / 100	53 ms	532 KiB

combo

#include "combo.h"
#include <set>
#include <iostream>

using namespace std;

string guess_sequence(int N) {
    string S = "";
    set<char> a = {'A', 'B', 'X', 'Y'};
    string p = "";
    for (auto& c : a){
        p = "";
        p += c;
        int coins = press(p);
        if (coins == 1){
            S += c;
            a.erase(c);
            break; 
        }
    }
    //cout << S << "\n";
    while ((int) S.size() < N){
        int idx = 1;
        for (auto& c : a){
            if (idx >= 3) break;
            p = S;
            p += c;
            int coins = press(p);
            if (coins == (int) S.size()+1){
                S += c;
                break;
            } 
            idx++;
        }
        //cout << idx << "\n";
        if (idx >= 3) S += *prev(a.end());
        //cout << S << "\n";
    }
    return S;
}

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