Submission #109614

#	Time	Username	Problem	Language	Result	Execution time	Memory
109614		youssefbou62	Combo (IOI18_combo)	C++14	5 / 100	109 ms	284 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" ; 
		string s2 = s ; 
		for(int i = 0 ; i < 4*n-1 ; i++ ) s2.pb(buttons[0]); 
		int ans = press ( s2 ) ; 
		while ( ans > (int)s.length() ) s.pb(buttons[0]) ; 
		
		while ( (int)s.length() != n ){
			 s2 = s + buttons[1] + buttons [0]; 
			 int  m = s.length();// cout<<s<<" "<<m<<endl;
			 ans = press(s2) ;  
			if( ans == m + 1 ) s += buttons[1] ; 
			else if( ans == m + 2 ) s += buttons[1] , s += buttons [0] ; 
			else {
				if( n -1 == m  ){
					 s += buttons[2]; 
					 continue ; 
				}
				s2 = s + buttons[2] + buttons[0] ; 
				ans = press ( s2 ) ;
				if( ans == m + 1 ) s += buttons[2] ; 
				else if( ans == m + 2 ) s = s2 ;   
			}
		}
		
		assert( (int)s.length() == n) ; 
		return s ; 
}

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