Submission #480648

#	Time	Username	Problem	Language	Result	Execution time	Memory
480648		couplefire	Combo (IOI18_combo)	C++17	5 / 100	1 ms	216 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;

string guess_sequence(int n){
    string cur = "";
    vector<string> c = {"A", "B", "X", "Y"};
    if(press(c[0]+c[1]))
        if(press(c[0])) cur = c[0];
        else cur = c[1], swap(c[0], c[1]);
    else if(press(c[2])) cur = c[2], swap(c[0], c[2]);
    else cur = c[3], swap(c[3], c[0]);
    for(int i = 2; i<=n-1; ++i){
        int res = press(cur+c[1]+cur+c[2]+c[1]+cur+c[2]+c[2]+cur+c[2]+c[3]);
        if(res==(int)cur.size()+1) cur += c[1];
        else if(res==(int)cur.size()+2) cur += c[2];
        else cur += c[3]; 
    }
    if(press(cur+c[1])==n) cur += c[1];
    else if(press(cur+c[2])==n) cur += c[2];
    else cur += c[3];
    return cur;
}

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