Submission #299596

#	Time	Username	Problem	Language	Result	Execution time	Memory
299596		Batyr	Combo (IOI18_combo)	C++17	0 / 100	1 ms	200 KiB

combo

#include<bits/stdc++.h>
#include "combo.h"
using namespace std;
#define pb push_back
#define ff first
#define ss second
#define sz(a) (int)a.size()
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> pii;
const ll inf=1e18;
const int mod=1e9+7;
const int maxn=1e5;

string s;
vector<char>v;

string guess_sequence(int N){
	int jog = press("AB");
	if(jog==2) s+='A';
	else if(jog==1){
		if(press("A")==1) s += 'A';
		else s += 'B';
	}
	else {
		if(press("X")==1) s += 'X';
		else s += 'Y';
	}
	
	if(s[0]=='A') v={'B','X','Y'};
	else if(s[0]=='B') v={'A','X','Y'};
	else if(s[0]=='X') v={'A','B','Y'};
	else v={'A','B','X'};
	
	for(int i = 1;i < N;i++){
		string ask="";
		ask += s+v[0]+v[0];
		ask += s+v[0]+v[1];
		ask += s+v[0]+v[2];
		ask += s+v[1];
		int now=press(ask);
		if(now==sz(s)+2) s+=v[0];
		else if(now==sz(s)+1) s+=v[1];
		else s+=v[2];
	}
	if(press(s+v[0])==sz(s)+1) s += v[0];
	else if(press(s+v[1])==sz(s)+1) s += v[1];
	else s += v[2];
	
	return s;
}

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