Submission #1161533

#	Time	Username	Problem	Language	Result	Execution time	Memory
1161533		JahonaliX	Combo (IOI18_combo)	C++20	100 / 100	8 ms	492 KiB

combo

#include <bits/stdc++.h>

using namespace std;

int press(string p);
 
string guess_sequence(int n) {
    string a = "";
    vector<string> s{"A", "B", "X", "Y"};
    if (press("AB")) {
        if (press("A")) a += "A";
        else a += "B";
    }
    else {
        if (press("X")) a += "X";
        else a += "Y";
    }
    s.erase(find(s.begin(), s.end(), a));
    for (int i = 2; i < n; ++i) {
        int x = press(a + s[0] + a + s[1] + s[0] + a + s[1] + s[1] + a + s[1] + s[2]);
        if (x == a.size()) a += s[2];
        else if (x == a.size() + 1) a += s[0];
        else a += s[1];
    }
    if (n > 1) {
        if (press(a + s[0]) > a.size()) a += s[0];
        else if (press(a + s[1]) > a.size()) a += s[1];
        else a += s[2];
    }
    return a;
};

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