Submission #311045

#	Time	Username	Problem	Language	Result	Execution time	Memory
311045		tigicha	Combo (IOI18_combo)	C++14	100 / 100	39 ms	632 KiB

combo

#include "combo.h"
#include<bits/stdc++.h>
using namespace std;
 
std::string guess_sequence(int N){
	string ans, s, s1;
	int a, n;
	n=N;
	if(press("XY")>=1){
	    if(press("X")==1){
		   ans="X";
		   s1="ABY";
		}
	  	else{
		  ans="Y";
		  s1="ABX";
		}
    }
	else if(press("A")==1){
	    ans="A";
		s1="BXY";
	}
	else{
	    ans="B";
	    s1="AXY";
	}
	if(n==1) return ans;
	for(long long i=2; i<n; i++){
		s=ans+s1[0]+ans+s1[1]+s1[0]+ans+s1[1]+s1[1]+ans+s1[1]+s1[2];
		a=press(s);
		if(a==i-1) ans+=s1[2];
		else if(a==i) ans+=s1[0];
		else ans+=s1[1];
	}
	s=ans+s1[0]+ans+s1[1];
	if(press(s)==n){
		s=ans+s1[0];
		if(press(s)==n) ans=ans+s1[0];
		else ans=ans+s1[1];
	}
	else ans=ans+s1[2];
	return ans;
}

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