Submission #566315

#	Time	Username	Problem	Language	Result	Execution time	Memory
566315		elazarkoren	Combo (IOI18_combo)	C++17	10 / 100	52 ms	468 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"
#define x first
#define y second
#define all(v) v.begin(), v.end()
#define chkmin(a, b) a = min(a, b)
#define chkmax(a, b) a = max(a, b)
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> pii;
typedef vector<pii> vii;

mt19937 rng(time(0));

char letters[] = {'A', 'B', 'X', 'Y'};

string guess_sequence(int n) {
    string p = "";
    for (int i = 0; i < n; i++) {
        shuffle(letters, letters + 4, rng);
        for (char c : letters) {
            if (i && c == p[0]) continue;
            p.push_back(c);
            if (press(p) == p.size()) break;
            p.pop_back();
        }
    }
    return p;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:26:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |             if (press(p) == p.size()) break;
      |                 ~~~~~~~~~^~~~~~~~~~~

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