Submission #975604

#	Time	Username	Problem	Language	Result	Execution time	Memory
975604		yeediot	Combo (IOI18_combo)	C++17	100 / 100	16 ms	1920 KiB

combo

#include "combo.h"
#include<bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define pb push_back
#define sz(x) (int)(x.size())
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
#define vi vector<int>
#define vp vector<pii>
#define vvi vector<vi>
#define ykh mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count())
#define __lg(x) 63-__builtin_clzll(x)
#define pow2(x) (1LL<<x)
string guess_sequence(int n){
    string s;
    vector<char>v={'A','B','X','Y'};
    string temp="AB";
    int res=press(temp);
    if(res>0){
        temp="A";
        res=press(temp);
        if(!res)swap(v[0],v[1]);
    }
    else{
        temp="X";
        res=press(temp);
        if(res)swap(v[0],v[2]);
        else swap(v[0],v[3]);
    }
    s+=v[0];
    if(n==1){
        return s;
    }
    for(int i=1;i+1<n;i++){
        temp=s+v[1]+v[1]+s+v[1]+v[2]+s+v[1]+v[3]+s+v[3];
        res=press(temp);
        if(res==i+2)s+=v[1];
        else if(res==i+1)s+=v[3];
        else s+=v[2];
    }
    if(press(s+v[1])==n)s+=v[1];
    else if(press(s+v[2])==n)s+=v[2];
    else s+=v[3];
    return s;
}
 /*
 input:
 
 */















 

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