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Submission #1007108

# Submission time Handle Problem Language Result Execution time Memory
1007108 2024-06-24T11:54:17 Z MilosMilutinovic Fire (BOI24_fire) C++14
100 / 100
 152 ms 38648 KB 
#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, m;
  cin >> n >> m;
  vector<int> a(n);
  vector<int> b(n);
  for (int i = 0; i < n; i++) {
    cin >> a[i] >> b[i];
    if (a[i] > b[i]) {
      b[i] += m;
    }
  }
  vector<pair<int, int>> ev;
  for (int i = 0; i < n; i++) {
    ev.emplace_back(a[i], ~i);
    ev.emplace_back(b[i], i);
  }
  sort(ev.begin(), ev.end());
  set<pair<int, int>> st;
  const int L = 20;
  vector<vector<int>> jump(n, vector<int>(L));
  for (auto& p : ev) {
    int i = p.second;
    if (i >= 0) {
      jump[i][0] = prev(st.end())->second;
      st.erase({b[i], i});
    } else {
      i = ~i;
      st.insert({b[i], i});
    }
  }
  for (int j = 1; j < L; j++) {
    for (int i = 0; i < n; i++) {
      jump[i][j] = jump[jump[i][j - 1]][j - 1];
    }
  }
  int res = n + 1;
  for (int i = 0; i < n; i++) {
    int idx = i;
    int total = 1;
    for (int j = L - 1; j >= 0; j--) {
      if (b[jump[idx][j]] < a[i] + m) {
        idx = jump[idx][j];
        total += (1 << j);
      }
    }
    res = min(res, total + 1);
  }
  if (res > n) {      
    cout << -1 << '\n';
  } else {
    cout << res << '\n';
  }
  return 0;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 456 KB Output is correct
12 Correct 0 ms 600 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 456 KB Output is correct
12 Correct 0 ms 600 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 456 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 456 KB Output is correct
12 Correct 0 ms 600 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 456 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 4 ms 1116 KB Output is correct
40 Correct 3 ms 1116 KB Output is correct
41 Correct 3 ms 1240 KB Output is correct
42 Correct 2 ms 1160 KB Output is correct
43 Correct 3 ms 1116 KB Output is correct
44 Correct 2 ms 1116 KB Output is correct
45 Correct 3 ms 1116 KB Output is correct
46 Correct 3 ms 1116 KB Output is correct
47 Correct 3 ms 1116 KB Output is correct
48 Correct 3 ms 1104 KB Output is correct
49 Correct 2 ms 1112 KB Output is correct
50 Correct 2 ms 1116 KB Output is correct

Subtask #4
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 452 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 456 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 3 ms 1108 KB Output is correct
16 Correct 2 ms 1116 KB Output is correct
17 Correct 3 ms 1236 KB Output is correct
18 Correct 2 ms 1116 KB Output is correct
19 Correct 2 ms 1192 KB Output is correct
20 Correct 116 ms 38648 KB Output is correct
21 Correct 120 ms 32720 KB Output is correct
22 Correct 118 ms 33208 KB Output is correct
23 Correct 112 ms 31860 KB Output is correct
24 Correct 116 ms 33220 KB Output is correct
25 Correct 152 ms 34504 KB Output is correct
26 Correct 111 ms 33312 KB Output is correct
27 Correct 102 ms 32360 KB Output is correct
28 Correct 116 ms 32452 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 2 ms 1116 KB Output is correct
13 Correct 2 ms 1156 KB Output is correct
14 Correct 3 ms 1116 KB Output is correct
15 Correct 109 ms 38592 KB Output is correct
16 Correct 108 ms 31428 KB Output is correct
17 Correct 109 ms 32964 KB Output is correct
18 Correct 110 ms 34120 KB Output is correct
19 Correct 111 ms 32964 KB Output is correct
20 Correct 108 ms 32192 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 456 KB Output is correct
12 Correct 0 ms 600 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 456 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 4 ms 1116 KB Output is correct
40 Correct 3 ms 1116 KB Output is correct
41 Correct 3 ms 1240 KB Output is correct
42 Correct 2 ms 1160 KB Output is correct
43 Correct 3 ms 1116 KB Output is correct
44 Correct 2 ms 1116 KB Output is correct
45 Correct 3 ms 1116 KB Output is correct
46 Correct 3 ms 1116 KB Output is correct
47 Correct 3 ms 1116 KB Output is correct
48 Correct 3 ms 1104 KB Output is correct
49 Correct 2 ms 1112 KB Output is correct
50 Correct 2 ms 1116 KB Output is correct
51 Correct 1 ms 348 KB Output is correct
52 Correct 0 ms 452 KB Output is correct
53 Correct 1 ms 348 KB Output is correct
54 Correct 1 ms 348 KB Output is correct
55 Correct 0 ms 348 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 1 ms 348 KB Output is correct
58 Correct 0 ms 456 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 0 ms 348 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Correct 1 ms 348 KB Output is correct
65 Correct 3 ms 1108 KB Output is correct
66 Correct 2 ms 1116 KB Output is correct
67 Correct 3 ms 1236 KB Output is correct
68 Correct 2 ms 1116 KB Output is correct
69 Correct 2 ms 1192 KB Output is correct
70 Correct 116 ms 38648 KB Output is correct
71 Correct 120 ms 32720 KB Output is correct
72 Correct 118 ms 33208 KB Output is correct
73 Correct 112 ms 31860 KB Output is correct
74 Correct 116 ms 33220 KB Output is correct
75 Correct 152 ms 34504 KB Output is correct
76 Correct 111 ms 33312 KB Output is correct
77 Correct 102 ms 32360 KB Output is correct
78 Correct 116 ms 32452 KB Output is correct
79 Correct 0 ms 348 KB Output is correct
80 Correct 0 ms 348 KB Output is correct
81 Correct 0 ms 348 KB Output is correct
82 Correct 0 ms 348 KB Output is correct
83 Correct 0 ms 348 KB Output is correct
84 Correct 0 ms 348 KB Output is correct
85 Correct 0 ms 348 KB Output is correct
86 Correct 0 ms 348 KB Output is correct
87 Correct 0 ms 348 KB Output is correct
88 Correct 0 ms 348 KB Output is correct
89 Correct 1 ms 348 KB Output is correct
90 Correct 2 ms 1116 KB Output is correct
91 Correct 2 ms 1156 KB Output is correct
92 Correct 3 ms 1116 KB Output is correct
93 Correct 109 ms 38592 KB Output is correct
94 Correct 108 ms 31428 KB Output is correct
95 Correct 109 ms 32964 KB Output is correct
96 Correct 110 ms 34120 KB Output is correct
97 Correct 111 ms 32964 KB Output is correct
98 Correct 108 ms 32192 KB Output is correct
99 Correct 112 ms 33224 KB Output is correct
100 Correct 118 ms 33224 KB Output is correct
101 Correct 116 ms 32460 KB Output is correct
102 Correct 106 ms 33244 KB Output is correct
103 Correct 115 ms 32444 KB Output is correct
104 Correct 109 ms 32448 KB Output is correct
105 Correct 61 ms 31176 KB Output is correct