oj.uz

Submission #689979

# Submission time Handle Problem Language Result Execution time Memory
689979 2023-01-30T00:32:50 Z bdl Event Hopping (BOI22_events) C++17
100 / 100
 140 ms 16840 KB 
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

#include <array>
#include <algorithm>
#include <iostream>
using namespace std;

const int N = 1e5, N_ = 1 << 18, L = 17;

int main() {
  ios::sync_with_stdio(0), cin.tie(0);
  int n, q;
  cin >> n >> q;
  static int l[N], r[N], c[N * 2];
  for (int i = 0; i < n; i++) {
    cin >> l[i] >> r[i];
    c[i << 1 | 0] = l[i], c[i << 1 | 1] = r[i];
  }
  sort(c, c + n * 2);
  int m = unique(c, c + n * 2) - c;
  static array<int, 2> t[N_ * 2];
  int n_;
  n_ = 1;
  while (n_ < m)
    n_ <<= 1;
  for (int i = 1; i < n_ * 2; i++)
    t[i] = {N_, -1};
  for (int i = 0; i < n; i++) {
    l[i] = lower_bound(c, c + m, l[i]) - c;
    r[i] = lower_bound(c, c + m, r[i]) - c;
    int p = n_ + r[i];
    while (p > 0)
      t[p] = min(t[p], {l[i], i}), p >>= 1;
  }
  static int p[L][N];
  for (int i = 0; i < n; i++) {
    array<int, 2> x = {N_, -1};
    for (int l_ = l[i] + n_, r_ = r[i] + n_; l_ <= r_; l_ >>= 1, r_ >>= 1) {
      if ((l_ & 1) == 1)
        x = min(x, t[l_++]);
      if ((r_ & 1) == 0)
        x = min(x, t[r_--]);
    }
    p[0][i] = x[1];
  }
  for (int lg = 1; lg < L; lg++)
    for (int i = 0; i < n; i++)
      p[lg][i] = p[lg - 1][p[lg - 1][i]];
  while (q--) {
    int i, j;
    cin >> i >> j, i--, j--;
    if (r[j] < r[i]) {
      cout << "impossible\n";
      continue;
    }
    if (i == j) {
      cout << 0 << '\n';
      continue;
    }
    if (l[j] <= r[i] && r[i] <= r[j]) {
      cout << 1 << '\n';
      continue;
    }
    int k = 0;
    for (int lg = L - 1; lg >= 0; lg--)
      if (l[p[lg][j]] > r[i])
        k += 1 << lg, j = p[lg][j];
    if (k > n) {
      cout << "impossible\n";
      continue;
    }
    cout << k + 2 << '\n';
  }
  return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 88 ms 11104 KB Output is correct
3 Correct 103 ms 11100 KB Output is correct
4 Correct 135 ms 11068 KB Output is correct
5 Correct 110 ms 11232 KB Output is correct
6 Correct 103 ms 11232 KB Output is correct
7 Correct 108 ms 11252 KB Output is correct
8 Correct 120 ms 13696 KB Output is correct
9 Correct 120 ms 16788 KB Output is correct
10 Correct 124 ms 14552 KB Output is correct
11 Correct 125 ms 16676 KB Output is correct
12 Correct 58 ms 13900 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 496 KB Output is correct
9 Correct 1 ms 468 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 496 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 592 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 496 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 31 ms 2384 KB Output is correct
20 Correct 29 ms 2456 KB Output is correct
21 Correct 33 ms 2604 KB Output is correct
22 Correct 25 ms 2772 KB Output is correct
23 Correct 24 ms 2760 KB Output is correct
24 Correct 27 ms 2716 KB Output is correct
25 Correct 28 ms 2316 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 496 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 460 KB Output is correct
16 Correct 1 ms 500 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 66 ms 12512 KB Output is correct
20 Correct 64 ms 11616 KB Output is correct
21 Correct 79 ms 12432 KB Output is correct
22 Correct 74 ms 14544 KB Output is correct
23 Correct 86 ms 14536 KB Output is correct
24 Correct 81 ms 14560 KB Output is correct
25 Correct 28 ms 9728 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 11084 KB Output is correct
2 Correct 107 ms 11164 KB Output is correct
3 Correct 120 ms 11100 KB Output is correct
4 Correct 110 ms 13648 KB Output is correct
5 Correct 110 ms 11468 KB Output is correct
6 Correct 116 ms 13388 KB Output is correct
7 Correct 122 ms 13300 KB Output is correct
8 Correct 107 ms 13412 KB Output is correct
9 Correct 85 ms 12504 KB Output is correct
10 Correct 109 ms 13000 KB Output is correct
11 Correct 110 ms 12756 KB Output is correct
12 Correct 107 ms 12980 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 88 ms 11104 KB Output is correct
3 Correct 103 ms 11100 KB Output is correct
4 Correct 135 ms 11068 KB Output is correct
5 Correct 110 ms 11232 KB Output is correct
6 Correct 103 ms 11232 KB Output is correct
7 Correct 108 ms 11252 KB Output is correct
8 Correct 120 ms 13696 KB Output is correct
9 Correct 120 ms 16788 KB Output is correct
10 Correct 124 ms 14552 KB Output is correct
11 Correct 125 ms 16676 KB Output is correct
12 Correct 58 ms 13900 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 496 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 468 KB Output is correct
25 Correct 1 ms 592 KB Output is correct
26 Correct 1 ms 468 KB Output is correct
27 Correct 1 ms 596 KB Output is correct
28 Correct 1 ms 468 KB Output is correct
29 Correct 1 ms 496 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 31 ms 2384 KB Output is correct
32 Correct 29 ms 2456 KB Output is correct
33 Correct 33 ms 2604 KB Output is correct
34 Correct 25 ms 2772 KB Output is correct
35 Correct 24 ms 2760 KB Output is correct
36 Correct 27 ms 2716 KB Output is correct
37 Correct 28 ms 2316 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 1 ms 468 KB Output is correct
41 Correct 1 ms 468 KB Output is correct
42 Correct 1 ms 468 KB Output is correct
43 Correct 1 ms 460 KB Output is correct
44 Correct 1 ms 500 KB Output is correct
45 Correct 1 ms 468 KB Output is correct
46 Correct 1 ms 468 KB Output is correct
47 Correct 66 ms 12512 KB Output is correct
48 Correct 64 ms 11616 KB Output is correct
49 Correct 79 ms 12432 KB Output is correct
50 Correct 74 ms 14544 KB Output is correct
51 Correct 86 ms 14536 KB Output is correct
52 Correct 81 ms 14560 KB Output is correct
53 Correct 28 ms 9728 KB Output is correct
54 Correct 85 ms 11084 KB Output is correct
55 Correct 107 ms 11164 KB Output is correct
56 Correct 120 ms 11100 KB Output is correct
57 Correct 110 ms 13648 KB Output is correct
58 Correct 110 ms 11468 KB Output is correct
59 Correct 116 ms 13388 KB Output is correct
60 Correct 122 ms 13300 KB Output is correct
61 Correct 107 ms 13412 KB Output is correct
62 Correct 85 ms 12504 KB Output is correct
63 Correct 109 ms 13000 KB Output is correct
64 Correct 110 ms 12756 KB Output is correct
65 Correct 107 ms 12980 KB Output is correct
66 Correct 1 ms 340 KB Output is correct
67 Correct 90 ms 14272 KB Output is correct
68 Correct 102 ms 14204 KB Output is correct
69 Correct 140 ms 14352 KB Output is correct
70 Correct 113 ms 14288 KB Output is correct
71 Correct 109 ms 14344 KB Output is correct
72 Correct 113 ms 14352 KB Output is correct
73 Correct 116 ms 16812 KB Output is correct
74 Correct 114 ms 16840 KB Output is correct
75 Correct 108 ms 14660 KB Output is correct
76 Correct 108 ms 16732 KB Output is correct
77 Correct 60 ms 14008 KB Output is correct
78 Correct 1 ms 340 KB Output is correct
79 Correct 1 ms 468 KB Output is correct
80 Correct 1 ms 468 KB Output is correct
81 Correct 1 ms 468 KB Output is correct
82 Correct 1 ms 468 KB Output is correct
83 Correct 1 ms 468 KB Output is correct
84 Correct 1 ms 468 KB Output is correct
85 Correct 1 ms 468 KB Output is correct
86 Correct 31 ms 2372 KB Output is correct
87 Correct 30 ms 2388 KB Output is correct
88 Correct 29 ms 2600 KB Output is correct
89 Correct 25 ms 2756 KB Output is correct
90 Correct 32 ms 2720 KB Output is correct
91 Correct 27 ms 2764 KB Output is correct
92 Correct 25 ms 2388 KB Output is correct
93 Correct 66 ms 12420 KB Output is correct
94 Correct 64 ms 11672 KB Output is correct
95 Correct 83 ms 12364 KB Output is correct
96 Correct 78 ms 14496 KB Output is correct
97 Correct 85 ms 14480 KB Output is correct
98 Correct 76 ms 14532 KB Output is correct
99 Correct 24 ms 9704 KB Output is correct
100 Correct 125 ms 16400 KB Output is correct
101 Correct 131 ms 16376 KB Output is correct
102 Correct 111 ms 16584 KB Output is correct
103 Correct 118 ms 16012 KB Output is correct
104 Correct 116 ms 15872 KB Output is correct
105 Correct 135 ms 16172 KB Output is correct
106 Correct 103 ms 13712 KB Output is correct
107 Correct 124 ms 13672 KB Output is correct
108 Correct 115 ms 14284 KB Output is correct
109 Correct 104 ms 14316 KB Output is correct
110 Correct 116 ms 16260 KB Output is correct
111 Correct 121 ms 16336 KB Output is correct