Submission #1225559

#	Time	Username	Problem	Language	Result	Execution time	Memory
1225559		edga1	Combo (IOI18_combo)	C++20	10 / 100	15 ms	492 KiB

combo

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

string guess_sequence(int N) {
    char l[]={'A','B','X','Y'};
    string p = "A";
    int atb=press(p);
    if(atb==0){
        p="B";
        atb=press(p);
    }
    if(atb==0){
        p="X";
        atb=press(p);
    }
    if(atb==0) p="Y";
    for(int i=2; i<=N; i++){
        for(int j=0; j<4; j++){
            if(l[j]==p[0]) continue;
            p=p.substr(0,i-1)+l[j];
            atb=press(p);
            if(atb==i) break;
        }
    }
    return p;
}

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