Submission #1053212

#	Time	Username	Problem	Language	Result	Execution time	Memory
1053212		vjudge1	Abracadabra (CEOI22_abracadabra)	C++17	10 / 100	3083 ms	40416 KiB

Main

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define all(x) x.begin(), x.end()
#define debug(x) cout << #x << ": " << x << endl;
void g(vector<int>&a) {
  for (auto el : a) cout << el << ", ";
  cout << endl;
}

void solve() {
  int n,q;cin>>n>>q;

  vector<int> a(n);
  for (int i = 0; i < n; i++) cin >> a[i];

  vector<tuple<int, int, int>> queries(q);
  for (int i = 0; i < q; i++) {
    int t,j;cin>>t>>j;j--;
    queries[i] = {t,j,i};
  }

  sort(all(queries));
  vector<int> ans(q);

  function<void()> shuffle = [&]() {
    vector<int> left, right;
    for (int i = 0; i < n; i++) {
      if (i < n/2) left.push_back(a[i]);
      else right.push_back(a[i]);
    }

    left.push_back(1e18);
    right.push_back(1e18);

    reverse(all(left));
    reverse(all(right));

    vector<int> cur;
    for (int i = 0; i < n; i++) {
      if (left.back() < right.back()) {
        cur.push_back(left.back());
        left.pop_back();
      }
      else {
        cur.push_back(right.back());
        right.pop_back();
      }
    }

    a = cur;
  };

  int nowt = 0;
  bool ok = 0;
  for (int i = 0; i < q; i++) {
    auto [t, idx, cid] = queries[i];

    while (nowt != t && !ok) {
      vector<int> prev = a;
      shuffle();
      if (prev == a) ok = 1;
      // g(a);
      nowt++;
    }

    // g(a);
    ans[cid] = a[idx];
  }

  for (auto el : ans) cout << el << endl;
}

int32_t main() {
  ios_base::sync_with_stdio(0);cin.tie(0);
  int t=1;
  while(t--) solve();

  return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 25
• Subtask 4: 0 / 25