Submission #156589

#	Time	Username	Problem	Language	Result	Execution time	Memory
156589		Evirir	Combo (IOI18_combo)	C++17	5 / 100	2 ms	280 KiB

combo

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include "combo.h"
using namespace std;
using namespace __gnu_pbds;

#define watch(x) cout<<(#x)<<"="<<(x)<<'\n'
#define mset(d,val) memset(d,val,sizeof(d))
#define setp(x) cout<<fixed<<setprecision(x)
#define forn(i,a,b) for(int i=a;i<b;i++)
#define fore(i,a,b) for(int i=a;i<=b;i++)
#define pb push_back
#define F first
#define S second
#define INF 2e14
#define MOD 998244353
#define pqueue priority_queue
#define fbo find_by_order
#define ook order_of_key
typedef long long ll;
typedef pair<ll,ll> ii;
typedef vector<ll> vi;
typedef vector<ii> vii;
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> pbds;

#define MAXN 100005

vector<string> c = {"A","B","X","Y"};

string guess_sequence(int n){
	string ans="";
	forn(i,0,3){
		if(press(c[i])){
			ans+=c[i];
			c.erase(c.begin()+i);
			break;
		}
	}
	if(ans==""){
		ans+=c[3];
		c.erase(c.begin()+3);
	}
	
	forn(i,1,n-1){
		string p=ans+c[0];
		forn(j,0,3){
			p+=ans+c[1]+c[j];
		}
		//cout<<p<<'\n';
		
		int res=press(p);
		if(res==i+1) ans+=c[0];
		else if(res==i+2) ans+=c[1];
		else ans+=c[2];
	}
	//cout<<ans<<'\n';
	int res=press(ans+c[0]);
	if(res==n) return ans+c[0];
	
	res=press(ans+c[1]);
	if(res==n) return ans+c[1];
	
	return ans+c[2];
}

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