Submission #1085363

#	Time	Username	Problem	Language	Result	Execution time	Memory
1085363		mingga	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include "bits/stdc++.h"

using namespace std;

#define ln "\n"
#define dbg(x) cout << #x << " = " << x << ln
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define inf 2e18
#define fast_cin()                  \
  ios_base::sync_with_stdio(false); \
  cin.tie(NULL)
#define out(file) freopen(file, "w", stdout)
#define in(file) freopen(file, "r", stdin)
#define all(x) (x).begin(), (x).end()
#define sz(x) ((int)(x).size())
#define int long long
int MOD = 1e9 + 7;

char d[4] = {'A', 'B', 'X', 'Y'};

string guess_sequence(int n) {
  string ans = "";
  char fir;
  for(int i = 0; i < 4; i++) {
    string cur = "" + d[i];
    if(press(cur) == 1) {
      ans += d[i];
      fir = d[i];
      break;
    } 
  }
  vector<char> vec;
  for(int i = 0; i < 4; i++) {
    if(d[i] == fir) continue;
    vec.pb(d[i]);
  }
  for(int i = 1; i < n; i++) {
      int cur = press(ans + d[0] + ans + d[1]);
      if(cur == sz(ans)) {
        ans += d[2];
      } else {
        int cur = press(ans + d[0]);
        if(cur == sz(ans)) ans += d[1];
        else ans += d[0];
      }
  }
  return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(long long int)':
combo.cpp:29:8: error: 'press' was not declared in this scope
   29 |     if(press(cur) == 1) {
      |        ^~~~~
combo.cpp:41:17: error: 'press' was not declared in this scope
   41 |       int cur = press(ans + d[0] + ans + d[1]);
      |                 ^~~~~