Submission #1202664

#	Time	Username	Problem	Language	Result	Execution time	Memory
1202664		okahak71	Combo (IOI18_combo)	C++20	0 / 100	0 ms	408 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ll long long
#define all(X) X.begin(), X.end()
#define allr(X) X.rbegin(), X.rend()
#define pb push_back
#define endl '\n'
using namespace std;
using namespace __gnu_pbds;

int press(string p);

string guess_sequence(int n){
    string res = "";
    string s = "ABXY";
    for(ll i = 0; i < 4; i++){
        res = s[i];
        if(press(res)){
            s = s.substr(0, i) + (i != 3 ? s.substr(i + 1, 4 - i) : "");
            break;
        }
    }
    for(ll i = 1; i < n; i++){
        char a = s[0], b = s[1];
        string temp = res + a + res + b;
        ll cur = press(temp);
        if(cur == res.size() + 1) res += a;
        else if(cur == res.size() * 2 + 2) res += b;
        else res += s[2];
    }
    return res;
}

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