Submission #587814

#	Time	Username	Problem	Language	Result	Execution time	Memory
587814		IvanJ	Combo (IOI18_combo)	C++17	5 / 100	1 ms	208 KiB

combo

#include "combo.h"
#include<bits/stdc++.h>

#define all(a) (a).begin(), (a).end()

using namespace std;

string guess_sequence(int n) {
	string p = "", s = "";
	if(press("A")) s = "A";
	else if(press("B")) s = "B";
	else if(press("X")) s = "X";
	else s = "Y";
  
	set<string> S;
	S.insert("A"), S.insert("B"), S.insert("X"), S.insert("Y");
	S.erase(s);
	vector<string> v(all(S));
	
	for(int i = 1;i < n - 1;i++) {
		p = s + v[0];
		for(int j = 0;j < 3;j++) 
			p += s + v[1] + v[j];
		int x = press(p);
		if(x == (int)s.size() + 1) s += v[0];
		else if(x == (int)s.size() + 2) s += v[1];
		else s += v[2];
	}
	
	if(press(s + v[0]) == n) s += v[0];
	else if(press(s + v[1]) == n) s += v[1];
	else s += v[2];
	return s;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95