Submission #1275488

#	Time	Username	Problem	Language	Result	Execution time	Memory
1275488		abyfu	Combo (IOI18_combo)	C++20	5 / 100	1 ms	400 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"
using namespace std;
#define pb push_back
#define ll long long
vector<string> rt;
int nn;
vector<char> mx = {'A', 'B', 'X', 'Y'};

void bt(string r, int u){
    if (u == nn){
        rt.pb(r);
    }
    else {
        for (int i = 0; i < 4; i++){
            bt(r + mx[i], u + 1);
        }
    }
}



string guess_sequence(int n){
    nn = n;
    if (n <= 3){
        bt("", 0);
        for (auto i : rt){
            if (press(i) == n){
                return i;
            }
        }
    }
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:33:1: warning: control reaches end of non-void function [-Wreturn-type]
   33 | }
      | ^

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