oj.uz

답안 #646869

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
646869 2022-09-30T21:59:50 Z chenwz Abracadabra (CEOI22_abracadabra) C++11
100 / 100
 622 ms 34184 KB 
// CEOI 2022 Day1 - Abracadabra
#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 p = 0, nb = ceil(log2(n));
    for (int b = 1 << nb; b >= 1; b >>= 1)
      if (p + b < n && C[p + b] < x) p += b, x -= C[p];
    return p + 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

# 결과 실행 시간 메모리 Grader output
1 Correct 269 ms 18456 KB Output is correct
2 Correct 294 ms 17128 KB Output is correct
3 Correct 290 ms 16716 KB Output is correct
4 Correct 264 ms 15508 KB Output is correct
5 Correct 279 ms 18872 KB Output is correct
6 Correct 271 ms 19212 KB Output is correct
7 Correct 270 ms 19720 KB Output is correct
8 Correct 312 ms 17712 KB Output is correct
9 Correct 240 ms 16644 KB Output is correct
10 Correct 261 ms 16484 KB Output is correct
11 Correct 264 ms 16844 KB Output is correct
12 Correct 224 ms 13904 KB Output is correct
13 Correct 256 ms 15644 KB Output is correct
14 Correct 269 ms 18312 KB Output is correct
15 Correct 330 ms 15740 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 217 ms 8048 KB Output is correct
18 Correct 237 ms 11804 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct

Subtask #2
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 360 ms 27080 KB Output is correct
2 Correct 371 ms 28768 KB Output is correct
3 Correct 270 ms 23640 KB Output is correct
4 Correct 259 ms 22860 KB Output is correct
5 Correct 262 ms 23404 KB Output is correct
6 Correct 267 ms 22540 KB Output is correct
7 Correct 320 ms 26948 KB Output is correct
8 Correct 304 ms 25860 KB Output is correct
9 Correct 258 ms 23440 KB Output is correct
10 Correct 300 ms 25756 KB Output is correct
11 Correct 247 ms 23260 KB Output is correct
12 Correct 253 ms 22452 KB Output is correct
13 Correct 287 ms 26028 KB Output is correct
14 Correct 252 ms 23308 KB Output is correct
15 Correct 301 ms 26420 KB Output is correct
16 Correct 31 ms 8788 KB Output is correct
17 Correct 199 ms 19400 KB Output is correct
18 Correct 221 ms 22696 KB Output is correct
19 Correct 84 ms 10748 KB Output is correct
20 Correct 94 ms 11992 KB Output is correct

Subtask #3
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 62 ms 7628 KB Output is correct
2 Correct 63 ms 7520 KB Output is correct
3 Correct 70 ms 7376 KB Output is correct
4 Correct 48 ms 6800 KB Output is correct
5 Correct 54 ms 7280 KB Output is correct
6 Correct 52 ms 6776 KB Output is correct
7 Correct 52 ms 7188 KB Output is correct
8 Correct 48 ms 6756 KB Output is correct
9 Correct 52 ms 7016 KB Output is correct
10 Correct 43 ms 6604 KB Output is correct
11 Correct 45 ms 6876 KB Output is correct
12 Correct 51 ms 6640 KB Output is correct
13 Correct 46 ms 6472 KB Output is correct
14 Correct 45 ms 6792 KB Output is correct
15 Correct 43 ms 6644 KB Output is correct
16 Correct 15 ms 4564 KB Output is correct
17 Correct 34 ms 5896 KB Output is correct
18 Correct 38 ms 5876 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct

Subtask #4
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 269 ms 18456 KB Output is correct
2 Correct 294 ms 17128 KB Output is correct
3 Correct 290 ms 16716 KB Output is correct
4 Correct 264 ms 15508 KB Output is correct
5 Correct 279 ms 18872 KB Output is correct
6 Correct 271 ms 19212 KB Output is correct
7 Correct 270 ms 19720 KB Output is correct
8 Correct 312 ms 17712 KB Output is correct
9 Correct 240 ms 16644 KB Output is correct
10 Correct 261 ms 16484 KB Output is correct
11 Correct 264 ms 16844 KB Output is correct
12 Correct 224 ms 13904 KB Output is correct
13 Correct 256 ms 15644 KB Output is correct
14 Correct 269 ms 18312 KB Output is correct
15 Correct 330 ms 15740 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 217 ms 8048 KB Output is correct
18 Correct 237 ms 11804 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 360 ms 27080 KB Output is correct
22 Correct 371 ms 28768 KB Output is correct
23 Correct 270 ms 23640 KB Output is correct
24 Correct 259 ms 22860 KB Output is correct
25 Correct 262 ms 23404 KB Output is correct
26 Correct 267 ms 22540 KB Output is correct
27 Correct 320 ms 26948 KB Output is correct
28 Correct 304 ms 25860 KB Output is correct
29 Correct 258 ms 23440 KB Output is correct
30 Correct 300 ms 25756 KB Output is correct
31 Correct 247 ms 23260 KB Output is correct
32 Correct 253 ms 22452 KB Output is correct
33 Correct 287 ms 26028 KB Output is correct
34 Correct 252 ms 23308 KB Output is correct
35 Correct 301 ms 26420 KB Output is correct
36 Correct 31 ms 8788 KB Output is correct
37 Correct 199 ms 19400 KB Output is correct
38 Correct 221 ms 22696 KB Output is correct
39 Correct 84 ms 10748 KB Output is correct
40 Correct 94 ms 11992 KB Output is correct
41 Correct 62 ms 7628 KB Output is correct
42 Correct 63 ms 7520 KB Output is correct
43 Correct 70 ms 7376 KB Output is correct
44 Correct 48 ms 6800 KB Output is correct
45 Correct 54 ms 7280 KB Output is correct
46 Correct 52 ms 6776 KB Output is correct
47 Correct 52 ms 7188 KB Output is correct
48 Correct 48 ms 6756 KB Output is correct
49 Correct 52 ms 7016 KB Output is correct
50 Correct 43 ms 6604 KB Output is correct
51 Correct 45 ms 6876 KB Output is correct
52 Correct 51 ms 6640 KB Output is correct
53 Correct 46 ms 6472 KB Output is correct
54 Correct 45 ms 6792 KB Output is correct
55 Correct 43 ms 6644 KB Output is correct
56 Correct 15 ms 4564 KB Output is correct
57 Correct 34 ms 5896 KB Output is correct
58 Correct 38 ms 5876 KB Output is correct
59 Correct 0 ms 212 KB Output is correct
60 Correct 0 ms 212 KB Output is correct
61 Correct 622 ms 34184 KB Output is correct
62 Correct 522 ms 33516 KB Output is correct
63 Correct 532 ms 32464 KB Output is correct
64 Correct 418 ms 31752 KB Output is correct
65 Correct 421 ms 33100 KB Output is correct
66 Correct 402 ms 31692 KB Output is correct
67 Correct 373 ms 31180 KB Output is correct
68 Correct 389 ms 29948 KB Output is correct
69 Correct 396 ms 32148 KB Output is correct
70 Correct 366 ms 28748 KB Output is correct
71 Correct 332 ms 31696 KB Output is correct
72 Correct 357 ms 29284 KB Output is correct
73 Correct 339 ms 30156 KB Output is correct
74 Correct 368 ms 31564 KB Output is correct
75 Correct 361 ms 30444 KB Output is correct
76 Correct 32 ms 8780 KB Output is correct
77 Correct 221 ms 19624 KB Output is correct
78 Correct 267 ms 22456 KB Output is correct
79 Correct 1 ms 212 KB Output is correct
80 Correct 0 ms 212 KB Output is correct