Submission #686939

#	Time	Username	Problem	Language	Result	Execution time	Memory
686939		viwlesxq	Combo (IOI18_combo)	C++17	10 / 100	59 ms	452 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
 
using namespace std;
 
typedef int64_t ll;
typedef string str;
 
#define pb push_back
#define pf push_front
#define ppb pop_back
#define ppf pop_front
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define sz(x) (int)x.size()
 
string guess_sequence(int N) {
	str res;
	vector <char> v;
	if (!press("X")) v.pb('X');
	else res += 'X';
	if (!press("Y")) v.pb('Y');
	else res += 'Y';
	if (!press("A")) v.pb('A');
	else res += 'A';
	if (!press("B")) v.pb('B'); 
	else res += 'B';
	for (int i = 2; i <= N; i++) {
		for (char ask : v) {
			if (press(res + ask) == i) {
				res += ask;
				break;
			}
		}
	}
	return res;
}

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