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Submission #646860

# Submission time Handle Problem Language Result Execution time Memory
646860 2022-09-30T21:53:58 Z chenwz Abracadabra (CEOI22_abracadabra) C++11
100 / 100
 583 ms 36360 KB 
// CEOI 2022 Day1 - Abracadabra
#include <bits/stdc++.h>
using namespace std;
using VI = vector<int>;
const int NN = 2e5 + 4;
struct BIT {
  // int C[NN];
  VI C;
  int n;
  BIT(int _n) : C(_n + 1), n(_n + 1) {}
  void add(int x, int v) {
    while (x < n) C[x] += v, x += x & -x;
  }
  int sum(int x) {
    int ret = 0;
    while (x) ret += C[x], x -= x & -x;
    return ret;
  }
  int kth(int x) {
    int pos = 0;
    for (int i = 17; i >= 0; i--)
      if (pos + (1 << i) < n && C[pos + (1 << i)] < x)
        pos += (1 << i), x -= C[pos];
    return pos + 1;
  }
};

int main() {
  ios::sync_with_stdio(false), cin.tie(0);
  int N, q;
  cin >> N >> q;
  BIT S(N);
  VI A(N), P(N + 1), Ans(q);
  vector<vector<pair<int, int>>> v(N + 1);
  for (int i = 0; i < N; i++) cin >> A[i], P[A[i]] = i;
  for (int i = 0, t, x; i < q; i++) {
    cin >> t >> x, t = min(t, N);
    if (t == 0)
      Ans[i] = A[x - 1];
    else
      v[t].emplace_back(x - 1, i);
  }
  VI nxt(N), ds(N + 1);
  auto SetVal = [&](int x, int v) { S.add(x, v - ds[x]), ds[x] = v; };
  for (int i = 0; i < N;) {
    int j = i + 1;
    while (j < N && A[j] < A[i]) j++;
    SetVal(A[i], j - i), i = j;
  }
  VI v2;
  for (int i = N - 1; i >= 0; i--) {
    while (!v2.empty() && A[v2.back()] < A[i]) v2.pop_back();
    nxt[i] = !v2.empty() ? v2.back() : N, v2.push_back(i);
  }
  for (int i = 1; i <= N; i++) {
    int itf = S.kth(N / 2 + 1), its = ds[itf], sum = S.sum(itf - 1);
    if (sum < N / 2) {
      int l = P[itf], r = l + its;
      SetVal(A[l], N / 2 - sum);
      l += N / 2 - sum;
      for (int i = l; i < r; i = nxt[i]) SetVal(A[i], min(r, nxt[i]) - i);
    }
    for (auto p : v[i]) {
      int pos = p.first, idx = p.second, qos = S.kth(pos + 1),
          sum = S.sum(qos - 1);
      Ans[idx] = A[P[qos] + pos - sum];
    }
  }
  for (int x : Ans) cout << x << "\n";
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 287 ms 19656 KB Output is correct
2 Correct 260 ms 19296 KB Output is correct
3 Correct 248 ms 18780 KB Output is correct
4 Correct 209 ms 17660 KB Output is correct
5 Correct 227 ms 20964 KB Output is correct
6 Correct 209 ms 21396 KB Output is correct
7 Correct 247 ms 22004 KB Output is correct
8 Correct 223 ms 19916 KB Output is correct
9 Correct 207 ms 18968 KB Output is correct
10 Correct 213 ms 18656 KB Output is correct
11 Correct 220 ms 19044 KB Output is correct
12 Correct 206 ms 16024 KB Output is correct
13 Correct 214 ms 17992 KB Output is correct
14 Correct 225 ms 20440 KB Output is correct
15 Correct 227 ms 18068 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 166 ms 10220 KB Output is correct
18 Correct 214 ms 13956 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 324 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 303 ms 29320 KB Output is correct
2 Correct 310 ms 31180 KB Output is correct
3 Correct 263 ms 25892 KB Output is correct
4 Correct 259 ms 25156 KB Output is correct
5 Correct 277 ms 25644 KB Output is correct
6 Correct 306 ms 24728 KB Output is correct
7 Correct 320 ms 29092 KB Output is correct
8 Correct 303 ms 28112 KB Output is correct
9 Correct 284 ms 25600 KB Output is correct
10 Correct 326 ms 27916 KB Output is correct
11 Correct 219 ms 25376 KB Output is correct
12 Correct 240 ms 24644 KB Output is correct
13 Correct 283 ms 28100 KB Output is correct
14 Correct 238 ms 25436 KB Output is correct
15 Correct 279 ms 28636 KB Output is correct
16 Correct 28 ms 9932 KB Output is correct
17 Correct 202 ms 21568 KB Output is correct
18 Correct 191 ms 24856 KB Output is correct
19 Correct 66 ms 12828 KB Output is correct
20 Correct 93 ms 14120 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 66 ms 9420 KB Output is correct
2 Correct 58 ms 8800 KB Output is correct
3 Correct 60 ms 8836 KB Output is correct
4 Correct 44 ms 8132 KB Output is correct
5 Correct 57 ms 8292 KB Output is correct
6 Correct 47 ms 8220 KB Output is correct
7 Correct 55 ms 7940 KB Output is correct
8 Correct 48 ms 7844 KB Output is correct
9 Correct 49 ms 8516 KB Output is correct
10 Correct 41 ms 8020 KB Output is correct
11 Correct 42 ms 7724 KB Output is correct
12 Correct 45 ms 8000 KB Output is correct
13 Correct 41 ms 7884 KB Output is correct
14 Correct 40 ms 8268 KB Output is correct
15 Correct 41 ms 7684 KB Output is correct
16 Correct 14 ms 4832 KB Output is correct
17 Correct 32 ms 6712 KB Output is correct
18 Correct 32 ms 6872 KB Output is correct
19 Correct 0 ms 316 KB Output is correct
20 Correct 0 ms 212 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 287 ms 19656 KB Output is correct
2 Correct 260 ms 19296 KB Output is correct
3 Correct 248 ms 18780 KB Output is correct
4 Correct 209 ms 17660 KB Output is correct
5 Correct 227 ms 20964 KB Output is correct
6 Correct 209 ms 21396 KB Output is correct
7 Correct 247 ms 22004 KB Output is correct
8 Correct 223 ms 19916 KB Output is correct
9 Correct 207 ms 18968 KB Output is correct
10 Correct 213 ms 18656 KB Output is correct
11 Correct 220 ms 19044 KB Output is correct
12 Correct 206 ms 16024 KB Output is correct
13 Correct 214 ms 17992 KB Output is correct
14 Correct 225 ms 20440 KB Output is correct
15 Correct 227 ms 18068 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 166 ms 10220 KB Output is correct
18 Correct 214 ms 13956 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 324 KB Output is correct
21 Correct 303 ms 29320 KB Output is correct
22 Correct 310 ms 31180 KB Output is correct
23 Correct 263 ms 25892 KB Output is correct
24 Correct 259 ms 25156 KB Output is correct
25 Correct 277 ms 25644 KB Output is correct
26 Correct 306 ms 24728 KB Output is correct
27 Correct 320 ms 29092 KB Output is correct
28 Correct 303 ms 28112 KB Output is correct
29 Correct 284 ms 25600 KB Output is correct
30 Correct 326 ms 27916 KB Output is correct
31 Correct 219 ms 25376 KB Output is correct
32 Correct 240 ms 24644 KB Output is correct
33 Correct 283 ms 28100 KB Output is correct
34 Correct 238 ms 25436 KB Output is correct
35 Correct 279 ms 28636 KB Output is correct
36 Correct 28 ms 9932 KB Output is correct
37 Correct 202 ms 21568 KB Output is correct
38 Correct 191 ms 24856 KB Output is correct
39 Correct 66 ms 12828 KB Output is correct
40 Correct 93 ms 14120 KB Output is correct
41 Correct 66 ms 9420 KB Output is correct
42 Correct 58 ms 8800 KB Output is correct
43 Correct 60 ms 8836 KB Output is correct
44 Correct 44 ms 8132 KB Output is correct
45 Correct 57 ms 8292 KB Output is correct
46 Correct 47 ms 8220 KB Output is correct
47 Correct 55 ms 7940 KB Output is correct
48 Correct 48 ms 7844 KB Output is correct
49 Correct 49 ms 8516 KB Output is correct
50 Correct 41 ms 8020 KB Output is correct
51 Correct 42 ms 7724 KB Output is correct
52 Correct 45 ms 8000 KB Output is correct
53 Correct 41 ms 7884 KB Output is correct
54 Correct 40 ms 8268 KB Output is correct
55 Correct 41 ms 7684 KB Output is correct
56 Correct 14 ms 4832 KB Output is correct
57 Correct 32 ms 6712 KB Output is correct
58 Correct 32 ms 6872 KB Output is correct
59 Correct 0 ms 316 KB Output is correct
60 Correct 0 ms 212 KB Output is correct
61 Correct 583 ms 36360 KB Output is correct
62 Correct 502 ms 35844 KB Output is correct
63 Correct 520 ms 34884 KB Output is correct
64 Correct 384 ms 33964 KB Output is correct
65 Correct 394 ms 35276 KB Output is correct
66 Correct 433 ms 33940 KB Output is correct
67 Correct 381 ms 33568 KB Output is correct
68 Correct 346 ms 32064 KB Output is correct
69 Correct 378 ms 34348 KB Output is correct
70 Correct 349 ms 30980 KB Output is correct
71 Correct 310 ms 33928 KB Output is correct
72 Correct 332 ms 31492 KB Output is correct
73 Correct 311 ms 32448 KB Output is correct
74 Correct 331 ms 33692 KB Output is correct
75 Correct 318 ms 32500 KB Output is correct
76 Correct 28 ms 9440 KB Output is correct
77 Correct 215 ms 21856 KB Output is correct
78 Correct 255 ms 24644 KB Output is correct
79 Correct 0 ms 212 KB Output is correct
80 Correct 0 ms 212 KB Output is correct