Submission #552294

#	Time	Username	Problem	Language	Result	Execution time	Memory
552294		nhquan	Combo (IOI18_combo)	C++17	10 / 100	87 ms	452 KiB

combo

#include <bits/stdc++.h>

#define pb push_back
#define mp make_pair
#define ii pair<int, int>
#define vi vector<int>
#define ff first
#define ss second
#define sz(a) (int)a.size()

#define fto(i, a, b) for (int i = a; i <= b; ++i)
#define fdto(i, a, b) for (int i = a; i >= b; --i)

#define ll long long

#define oo 1000000007
#define maxN 100005
#define maxM 3

using namespace std;

int press(string p);

string guess_sequence(int n) {
    vector<char> chr = {'A', 'B', 'X', 'Y'};
    string s = "";
    string p = "";

    fto(i, 0, n-1) s += 'A';

    fto(i, 0, n-1) {
        p += '0';
        fto(j, 0, 3) {
            p[i] = chr[j];
            int chk = press(p);
            if (chk == sz(p)) s[i] = p[i];
        }
        p[i] = s[i];
    }
    return s;
}

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