Submission #373585

#	Time	Username	Problem	Language	Result	Execution time	Memory
373585		BartolM	Combo (IOI18_combo)	C++17	5 / 100	2 ms	200 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>

using namespace std;

#define X first
#define Y second
#define mp make_pair
#define pb push_back
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <int, pii> pip;
typedef pair <pii, int> ppi;
typedef pair <ll, ll> pll;

const int INF=0x3f3f3f3f;

string prvi, sl="";
string sol="";


string guess_sequence(int n) {
    int x=press("AB");
    if (x) {
        x=press("A");
        if (x) prvi="A";
        else prvi="B";
    }
    else {
        x=press("X");
        if (x) prvi="X";
        else prvi="Y";
    }
    for (char c:"ABXY") if (c!=prvi[0]) sl+=c;
    sol=prvi;
    for (int i=2; i<n; ++i) {
        string curr=sol+sl[0]+sol+sl[1]+sl[0]+sol+sl[1]+sl[1]+sol+sl[1]+sl[2];
        int x=press(curr);
        if (x==i) sol+=sl[0];
        else if (x==i+1) sol+=sl[1];
        else sol+=sl[2];
    }
    if (press(sol+sl[0])==n) return sol+sl[0];
    if (press(sol+sl[1])==n) return sol+sl[1];
    return sol+sl[2];
}

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