Submission #170093

#	Time	Username	Problem	Language	Result	Execution time	Memory
170093		buttercrab	Combo (IOI18_combo)	C++17	100 / 100	41 ms	532 KiB

combo

#include "combo.h"

using namespace std;

string guess_sequence(int n) {
    string s, t;
    if (press("AB")) {
        if (press("A")) t = "BXY", s = "A";
        else t = "AXY", s = "B";
    } else {
        if (press("X")) t = "ABY", s = "X";
        else t = "ABX", s = "Y";
    }

    for (int i = 1; i < n - 1; i++) {
        s += t[press(s + t[1] + s + t[2] + t[0] + s + t[2] + t[1] + s + t[2] + t[2]) - s.size()];
    }

    if(n == 1) return s;
    if(press(s + t[0]) == n) return s + t[0];
    if(press(s + t[1]) == n) return s + t[1];
    return s + t[2];
}

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