Submission #411586

#	Time	Username	Problem	Language	Result	Execution time	Memory
411586		nichke	Combo (IOI18_combo)	C++14	10 / 100	71 ms	540 KiB

combo

#include <bits/stdc++.h>
using namespace std;

string but = "ABXY";
string t = "";

set<int> s;
int ff;
int press(string p);

string guess_sequence(int N) {
	string res = "";
	for (int i = 0; i < 4; i++) {
		t = res;
		t += but[i];
		if (press(t)) {
			res = t;
			ff = i;
			break;
		}
	}
	for (int i = 1; i < N; i++) {
		s.clear();
		s.insert(ff);
		for (int j = 0; j < 4; j++) {
			if (j == ff) continue;
			if (s.size() == 3) {
				res += but[j];
				break;
			}
			s.insert(j);
			t = res;
			t += but[j];
			if (press(t) == i + 1) {
				res = t;
				break;
			}
		}
		
	}
	return res;
}

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