Submission #331953

#	Time	Username	Problem	Language	Result	Execution time	Memory
331953		Yomapeed	Combo (IOI18_combo)	C++17	100 / 100	44 ms	696 KiB

combo

#include<bits/stdc++.h>
#define pi 3.141592653589793238
#include "combo.h"
#define MOD 1000000007
#define INF 999999999999999999 
#define pb push_back
#define ff first
#define ss second
#define mp make_pair
#define mt make_tuple 
#define ll long long
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
 
using namespace __gnu_pbds;
 
 
typedef tree<ll, null_type, less_equal<ll>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
 
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
string guess_sequence(int n){
    int i;
    string ans = "";
    vector<char> c = {'A', 'B', 'X', 'Y'};
    if(press("AB")){
        c.clear();
        if(press("A")){
            c = {'B', 'X', 'Y'};
            ans = "A";
        }
        else{
            ans = "B";
            c = {'A', 'X', 'Y'};
        }
    }
    else{
        c.clear();
        if(press("X")){
            c = {'A', 'B', 'Y'};
            ans = "X";
        }
        else{
            ans = "Y";
            c = {'A', 'B', 'X'};
        }
    }
    //cout << c.size() << endl;
    //cout << "# " << c[0] << c[1] << c[2] << c[3] << endl;
    if(n == 1){
        return ans;
    }
    for(i = 1; i < n - 1; i++){
        string aa, bb, cc, dd;
        aa = ans + c[0];
        bb = ans + c[1] + c[1];
        cc = ans + c[1] + c[2];
        dd = ans + c[1] + c[0];
        int val = press(aa + bb + cc + dd) - i;
        //cout << "# " << val << endl;
        if(val == 1){
            ans += c[0];
        }
        else if(val == 2){
            ans += c[1];
        }
        else if(val == 0){
            ans += c[2];
        }
    }
    if(press(ans + c[0]) == n){
        ans += c[0];
    }
    else if(press(ans + c[1]) == n){
        ans += c[1];
    }
    else{
        ans += c[2];
    }
    return ans;
} 

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