Submission #1085436

#	Time	Username	Problem	Language	Result	Execution time	Memory
1085436		mingga	Combo (IOI18_combo)	C++17	0 / 100	0 ms	596 KiB

combo

#include "bits/stdc++.h"
#include "combo.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;

string d[4] = {"A", "B", "X", "Y"};

string guess_sequence(int n) {
  string ans = "";
  if(press("AB") > 0) {
    if(press("A") == 1) ans += 'A';
    else ans += 'B';
  } else {
    if(press("X") == 1) ans += 'X';
    else ans += 'Y';
  }
  string fir = ans;
  vector<string> vec;
  for(int i = 0; i < 4; i++) {
    if(d[i] == fir) continue;
    vec.pb(d[i]);
  }
  for(int i = 1; i < n; i++) {
    string tmp = "";
    for(int j = 0; j < 3; j++) {
      tmp += ans + vec[0] + vec[j];
    }
    tmp += ans + vec[1];
    int cur = press(tmp);
    if(cur == 2) {
      ans += vec[0];
    } else if(cur == 1) {
      ans += vec[1];
    } else ans += vec[2];
  }
  return ans;
}

// signed main() {
//   string a = "";
//   a += d[1] + d[2] + d[0];
//   string tmp = a + d[0] + a + d[1] + a + d[2] + a + d[3];
//   cout << tmp; 
// }

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