Submission #301878

#	Time	Username	Problem	Language	Result	Execution time	Memory
301878		Dovran	Combo (IOI18_combo)	C++11	5 / 100	1 ms	200 KiB

combo

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

#define N 100009
#define pii pair <int, int>
#define ff first
#define sz() size()
#define ss second
#define pb push_back
#define ll long long

using namespace std;

char c[5]={'X', 'Y', 'A', 'B'};
string a;
/*
int press(string ss){
	cout<<ss<<'\n';
	int y;
	cin>>y;
	return y;
}
*/
string guess_sequence(int n){
	string s;
	int in;
	s+="AB";
	int x=press(s);
	if(x){
		s='A';
		in=3;
		x=press(s);
		if(x)
			in=2;
	}
	else{
		s='X';
		in=1;
		x=press(s);
		if(x)
			in=0;	
	}
	s=c[in];
	swap(c[in], c[3]);
	for(int i=2; i<n; i++){
		a=s+c[0];
		a+=s+c[1]+c[0];
		a+=s+c[1]+c[1];
		a+=s+c[1]+c[2];
		x=press(a);
		if(x==i){
			s+=c[0];
			if(x==n) return s;
		}
		else if(x==i+1)
			s+=c[1];
		else{
			s+=c[2];
			if(x==n) return s;
		}
	}
	a=s+c[0];
	x=press(a);
	if(x==n)
		return a;
	a=s+c[1];
	x=press(a);
	if(x==n)
		return a;
	s+=c[2];
	return s;
}
/*
int main(){
	int n;
	cin>>n;
	cout<<guess_sequence(n);
}*/

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