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Submission #891692

# Submission time Handle Problem Language Result Execution time Memory
891692 2023-12-23T16:47:21 Z tsumondai Abracadabra (CEOI22_abracadabra) C++14
100 / 100
 522 ms 48428 KB 
#include <bits/stdc++.h>
using namespace std;
using VI = vector<int>;
struct BIT {
  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 b = 1 << 17; b >= 1; b >>= 1)
      if (pos + b < n && C[pos + b] < x) pos += b, 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 199 ms 26196 KB Output is correct
2 Correct 216 ms 24520 KB Output is correct
3 Correct 201 ms 23868 KB Output is correct
4 Correct 171 ms 21796 KB Output is correct
5 Correct 182 ms 26060 KB Output is correct
6 Correct 175 ms 25628 KB Output is correct
7 Correct 182 ms 27220 KB Output is correct
8 Correct 176 ms 24288 KB Output is correct
9 Correct 173 ms 23068 KB Output is correct
10 Correct 177 ms 23092 KB Output is correct
11 Correct 168 ms 23212 KB Output is correct
12 Correct 161 ms 19376 KB Output is correct
13 Correct 170 ms 21920 KB Output is correct
14 Correct 179 ms 25128 KB Output is correct
15 Correct 178 ms 22072 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 145 ms 13772 KB Output is correct
18 Correct 150 ms 17336 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 268 ms 41656 KB Output is correct
2 Correct 256 ms 42172 KB Output is correct
3 Correct 200 ms 35664 KB Output is correct
4 Correct 189 ms 35772 KB Output is correct
5 Correct 199 ms 35416 KB Output is correct
6 Correct 184 ms 34732 KB Output is correct
7 Correct 232 ms 40476 KB Output is correct
8 Correct 224 ms 38812 KB Output is correct
9 Correct 189 ms 34744 KB Output is correct
10 Correct 216 ms 37560 KB Output is correct
11 Correct 187 ms 33616 KB Output is correct
12 Correct 177 ms 33208 KB Output is correct
13 Correct 212 ms 37000 KB Output is correct
14 Correct 178 ms 33816 KB Output is correct
15 Correct 226 ms 38584 KB Output is correct
16 Correct 23 ms 10076 KB Output is correct
17 Correct 159 ms 28640 KB Output is correct
18 Correct 158 ms 31068 KB Output is correct
19 Correct 55 ms 13568 KB Output is correct
20 Correct 67 ms 16588 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 9416 KB Output is correct
2 Correct 47 ms 9408 KB Output is correct
3 Correct 47 ms 9168 KB Output is correct
4 Correct 36 ms 8524 KB Output is correct
5 Correct 40 ms 9044 KB Output is correct
6 Correct 37 ms 8528 KB Output is correct
7 Correct 42 ms 8948 KB Output is correct
8 Correct 39 ms 8532 KB Output is correct
9 Correct 43 ms 8692 KB Output is correct
10 Correct 31 ms 8016 KB Output is correct
11 Correct 34 ms 8540 KB Output is correct
12 Correct 32 ms 8536 KB Output is correct
13 Correct 34 ms 8020 KB Output is correct
14 Correct 33 ms 8276 KB Output is correct
15 Correct 31 ms 8276 KB Output is correct
16 Correct 12 ms 5212 KB Output is correct
17 Correct 25 ms 7168 KB Output is correct
18 Correct 27 ms 7392 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 199 ms 26196 KB Output is correct
2 Correct 216 ms 24520 KB Output is correct
3 Correct 201 ms 23868 KB Output is correct
4 Correct 171 ms 21796 KB Output is correct
5 Correct 182 ms 26060 KB Output is correct
6 Correct 175 ms 25628 KB Output is correct
7 Correct 182 ms 27220 KB Output is correct
8 Correct 176 ms 24288 KB Output is correct
9 Correct 173 ms 23068 KB Output is correct
10 Correct 177 ms 23092 KB Output is correct
11 Correct 168 ms 23212 KB Output is correct
12 Correct 161 ms 19376 KB Output is correct
13 Correct 170 ms 21920 KB Output is correct
14 Correct 179 ms 25128 KB Output is correct
15 Correct 178 ms 22072 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 145 ms 13772 KB Output is correct
18 Correct 150 ms 17336 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 268 ms 41656 KB Output is correct
22 Correct 256 ms 42172 KB Output is correct
23 Correct 200 ms 35664 KB Output is correct
24 Correct 189 ms 35772 KB Output is correct
25 Correct 199 ms 35416 KB Output is correct
26 Correct 184 ms 34732 KB Output is correct
27 Correct 232 ms 40476 KB Output is correct
28 Correct 224 ms 38812 KB Output is correct
29 Correct 189 ms 34744 KB Output is correct
30 Correct 216 ms 37560 KB Output is correct
31 Correct 187 ms 33616 KB Output is correct
32 Correct 177 ms 33208 KB Output is correct
33 Correct 212 ms 37000 KB Output is correct
34 Correct 178 ms 33816 KB Output is correct
35 Correct 226 ms 38584 KB Output is correct
36 Correct 23 ms 10076 KB Output is correct
37 Correct 159 ms 28640 KB Output is correct
38 Correct 158 ms 31068 KB Output is correct
39 Correct 55 ms 13568 KB Output is correct
40 Correct 67 ms 16588 KB Output is correct
41 Correct 47 ms 9416 KB Output is correct
42 Correct 47 ms 9408 KB Output is correct
43 Correct 47 ms 9168 KB Output is correct
44 Correct 36 ms 8524 KB Output is correct
45 Correct 40 ms 9044 KB Output is correct
46 Correct 37 ms 8528 KB Output is correct
47 Correct 42 ms 8948 KB Output is correct
48 Correct 39 ms 8532 KB Output is correct
49 Correct 43 ms 8692 KB Output is correct
50 Correct 31 ms 8016 KB Output is correct
51 Correct 34 ms 8540 KB Output is correct
52 Correct 32 ms 8536 KB Output is correct
53 Correct 34 ms 8020 KB Output is correct
54 Correct 33 ms 8276 KB Output is correct
55 Correct 31 ms 8276 KB Output is correct
56 Correct 12 ms 5212 KB Output is correct
57 Correct 25 ms 7168 KB Output is correct
58 Correct 27 ms 7392 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 522 ms 48428 KB Output is correct
62 Correct 423 ms 46788 KB Output is correct
63 Correct 391 ms 45252 KB Output is correct
64 Correct 296 ms 44364 KB Output is correct
65 Correct 325 ms 46676 KB Output is correct
66 Correct 337 ms 44244 KB Output is correct
67 Correct 280 ms 44368 KB Output is correct
68 Correct 289 ms 42264 KB Output is correct
69 Correct 303 ms 44728 KB Output is correct
70 Correct 262 ms 40788 KB Output is correct
71 Correct 242 ms 42864 KB Output is correct
72 Correct 257 ms 41240 KB Output is correct
73 Correct 254 ms 41556 KB Output is correct
74 Correct 272 ms 43604 KB Output is correct
75 Correct 262 ms 42324 KB Output is correct
76 Correct 27 ms 10076 KB Output is correct
77 Correct 185 ms 28844 KB Output is correct
78 Correct 195 ms 31684 KB Output is correct
79 Correct 0 ms 600 KB Output is correct
80 Correct 0 ms 348 KB Output is correct