Submission #1221258

#	Time	Username	Problem	Language	Result	Execution time	Memory
1221258		hmms127	Combo (IOI18_combo)	C++20	0 / 100	0 ms	408 KiB

combo

#include<iostream>
#include<vector>
#include<set>
#include<algorithm>
#include<stack>
using namespace std;
const int mod=1e9+7;
string guess_sequence(int N);
int press(string s);
string l;
string guess_sequence(int N) {
    string z;
    if(press("AB")) {
        if(press("A")) {
            z+='A';
            l="BXY";
        }
        else {
            z+='B';
            l="AXY";
        }
    }
    else {
        if(press("X")) {
            z+='X';
            l="ABY";
        }
        else {
            z+='Y';
            l="ABX";
        }
    }
    while(z.size()<N-1) {
        int cnt=press(z+l[0]+l[0]+z+l[0]+l[1]+z+l[0]+l[2]+z+l[1]);
        if(cnt==0) {
            z+=l[2];
        }
        else if(cnt==1) {
            z+=l[1];
        }
        else {
            z+=l[0];
        }
    }
    if(z.size()==N-1) {
        if(press(z+l[0])) {
            z+=l[0];
        }
        else if(press(z+l[1])) {
            z+=l[1];
        }
        else {
            z+=l[2];
        }
    }
    return z;
}

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