Submission #109655

#	Time	Username	Problem	Language	Result	Execution time	Memory
109655		youssefbou62	Combo (IOI18_combo)	C++14	97 / 100	41 ms	672 KiB

combo

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

#define mp make_pair
#define fi first
#define se second
#define all(v) v.begin(),v.end()
#define allarr(a) a , a + n
#define pb push_back



string guess_sequence (int n){
		string buttons ,s;  
		if( press("A")==1 ) s.pb('A') , buttons = "BXY" ;
		else if( press("B")==1 ) s.pb('B') , buttons = "AXY" ;
		else if( press("X")==1 ) s.pb('X') , buttons = "ABY" ;
		else  s.pb('Y' ) , buttons = "ABX" ; 
		
		while ( (int)s.length() != n ){
			string s2 ;
			int ans ;  
			if( (int) s.length() == n-1 ) {
			  s2 = s + buttons[0] + s + buttons[1]; 
				if( press ( s2 ) == (int)s.length()  ){
					s.pb(buttons[2]) ; 
					break ; 
				}
			s2 = s + buttons[1] ; 
			if( press ( s2 ) == (int)s.length() + 1 ){
					s.pb(buttons[1]) ; 
					break ; 
			}
			s += buttons[0] ; 
			break ;  
			}
			else 	
			s2 = s + buttons[0] + s + buttons[1] + buttons[0] + s + buttons[1] + buttons[1] + s + buttons[1] + buttons[2] ; 
			 ans = press ( s2 ) ; 
			if( ans == (int)s.length() ){
				s.pb(buttons[2]) ; 
			}else if( ans == (int)s.length() + 1 ){
				s.pb(buttons[0]) ; 
			}else if( ans == (int)s.length() + 2 ){
				s.pb(buttons[1]); 
			}
		
		}
		
		assert( (int)s.length() == n) ; 
		return s ; 
}

• Subtask 1: 5 / 5
• Subtask 2: 92 / 95