oj.uz

Submission #894221

# Submission time Handle Problem Language Result Execution time Memory
894221 2023-12-28T02:58:01 Z box Railway Trip 2 (JOI22_ho_t4) C++17
100 / 100
 338 ms 55948 KB 
#include <array>
#include <iostream>
#include <set>
#include <vector>
using namespace std;
 
#define ar array
 
const int N = 1e5, N_ = 1 << 17, L = 17;
 
ar<int, 2> operator+(const ar<int, 2> &u, const ar<int, 2> &v) {
  return {min(u[0], v[0]), max(u[1], v[1])};
}
 
int n_;
 
void build(ar<int, 2> *t, ar<int, 2> *p, int n) {
  for (int i = 0; i < n_; i++) t[n_ + i] = i < n ? p[i] : ar{0, 0};
  for (int i = n_ - 1; i > 0; i--) t[i] = t[i << 1 | 0] + t[i << 1 | 1];
}
 
ar<int, 2> query(ar<int, 2> *t, int l, int r) {
  ar<int, 2> x = {N, 0};
  for (l += n_, r += n_; l <= r; l >>= 1, r >>= 1) {
    if ((l & 1) == 1) x = x + t[l++];
    if ((r & 1) == 0) x = x + t[r--];
  }
  return x;
}
 
int main() {
  int n, k;
  scanf("%d%d", &n, &k);
  int m;
  scanf("%d", &m);
  static vector<pair<int, int>> el[N + 1], er[N + 1];
  while (m--) {
    int i, j;
    scanf("%d%d", &i, &j), i--, j--;
    if (i < j) {
      er[i].push_back({j, +1});
      er[min(i + k, j)].push_back({j, -1});
    } else {
      el[max(i - k, j) + 1].push_back({j, +1});
      el[i + 1].push_back({j, -1});
    }
  }
  multiset<int> ls, rs;
  static ar<int, 2> p[N];
  for (int i = 0; i < n; i++) {
    for (auto [x, t] : el[i])
      if (t == +1)
        ls.insert(x);
      else
        ls.erase(ls.find(x));
    for (auto [x, t] : er[i])
      if (t == +1)
        rs.insert(x);
      else
        rs.erase(rs.find(x));
    p[i][0] = ls.empty() ? i : *ls.begin();
    p[i][1] = rs.empty() ? i : *rs.rbegin();
  }
  n_ = 1;
  while (n_ < n) n_ <<= 1;
  static ar<int, 2> tb[L][N_ * 2];
  build(tb[0], p, n);
  for (int l = 1; l < L; l++) {
    for (int i = 0; i < n; i++) p[i] = query(tb[l - 1], p[i][0], p[i][1]);
    build(tb[l], p, n);
  }
  int q;
  scanf("%d", &q);
  while (q--) {
    int i, j;
    scanf("%d%d", &i, &j), i--, j--;
    if (i == j) {
      printf("0\n");
      continue;
    }
    int x = 1;
    ar<int, 2> p = {i, i};
    for (int l = L - 1; l >= 0; l--) {
      ar<int, 2> q = query(tb[l], p[0], p[1]);
      if (q[0] > j || q[1] < j) p = q, x += 1 << l;
    }
    printf("%d\n", x == (1 << L) ? -1 : x);
  }
  return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:33:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |   scanf("%d%d", &n, &k);
      |   ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:35:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |   scanf("%d", &m);
      |   ~~~~~^~~~~~~~~~
Main.cpp:39:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |     scanf("%d%d", &i, &j), i--, j--;
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:73:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   73 |   scanf("%d", &q);
      |   ~~~~~^~~~~~~~~~
Main.cpp:76:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |     scanf("%d%d", &i, &j), i--, j--;
      |     ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 40028 KB Output is correct
2 Correct 7 ms 40024 KB Output is correct
3 Correct 7 ms 40256 KB Output is correct
4 Correct 7 ms 40028 KB Output is correct
5 Correct 8 ms 40028 KB Output is correct
6 Correct 7 ms 40028 KB Output is correct
7 Correct 7 ms 40028 KB Output is correct
8 Correct 6 ms 40024 KB Output is correct
9 Correct 7 ms 40004 KB Output is correct
10 Correct 6 ms 39892 KB Output is correct
11 Correct 7 ms 40028 KB Output is correct
12 Correct 8 ms 39864 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 40028 KB Output is correct
2 Correct 7 ms 40024 KB Output is correct
3 Correct 7 ms 40256 KB Output is correct
4 Correct 7 ms 40028 KB Output is correct
5 Correct 8 ms 40028 KB Output is correct
6 Correct 7 ms 40028 KB Output is correct
7 Correct 7 ms 40028 KB Output is correct
8 Correct 6 ms 40024 KB Output is correct
9 Correct 7 ms 40004 KB Output is correct
10 Correct 6 ms 39892 KB Output is correct
11 Correct 7 ms 40028 KB Output is correct
12 Correct 8 ms 39864 KB Output is correct
13 Correct 10 ms 40028 KB Output is correct
14 Correct 9 ms 40152 KB Output is correct
15 Correct 8 ms 40108 KB Output is correct
16 Correct 10 ms 40028 KB Output is correct
17 Correct 10 ms 40212 KB Output is correct
18 Correct 9 ms 40220 KB Output is correct
19 Correct 10 ms 40028 KB Output is correct
20 Correct 8 ms 40164 KB Output is correct
21 Correct 8 ms 40052 KB Output is correct
22 Correct 10 ms 40140 KB Output is correct
23 Correct 9 ms 40068 KB Output is correct
24 Correct 9 ms 40024 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 132 ms 44632 KB Output is correct
2 Correct 123 ms 44572 KB Output is correct
3 Correct 154 ms 44960 KB Output is correct
4 Correct 116 ms 44372 KB Output is correct
5 Correct 207 ms 52416 KB Output is correct
6 Correct 169 ms 49352 KB Output is correct
7 Correct 145 ms 55324 KB Output is correct
8 Correct 152 ms 48204 KB Output is correct
9 Correct 119 ms 48476 KB Output is correct
10 Correct 175 ms 50132 KB Output is correct
11 Correct 174 ms 50104 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 148 ms 49400 KB Output is correct
2 Correct 226 ms 52920 KB Output is correct
3 Correct 207 ms 45648 KB Output is correct
4 Correct 164 ms 55948 KB Output is correct
5 Correct 217 ms 55280 KB Output is correct
6 Correct 207 ms 55280 KB Output is correct
7 Correct 217 ms 50940 KB Output is correct
8 Correct 227 ms 50756 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 338 ms 51980 KB Output is correct
2 Correct 236 ms 45892 KB Output is correct
3 Correct 201 ms 43556 KB Output is correct
4 Correct 218 ms 42272 KB Output is correct
5 Correct 130 ms 41968 KB Output is correct
6 Correct 175 ms 41356 KB Output is correct
7 Correct 182 ms 51016 KB Output is correct
8 Correct 10 ms 40028 KB Output is correct
9 Correct 10 ms 40028 KB Output is correct
10 Correct 254 ms 52404 KB Output is correct
11 Correct 266 ms 54356 KB Output is correct
12 Correct 285 ms 52568 KB Output is correct
13 Correct 281 ms 54256 KB Output is correct
14 Correct 7 ms 39868 KB Output is correct
15 Correct 10 ms 40168 KB Output is correct
16 Correct 185 ms 49352 KB Output is correct
17 Correct 283 ms 49972 KB Output is correct
18 Correct 298 ms 50332 KB Output is correct
19 Correct 272 ms 50084 KB Output is correct

Subtask #6
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 40028 KB Output is correct
2 Correct 7 ms 40024 KB Output is correct
3 Correct 7 ms 40256 KB Output is correct
4 Correct 7 ms 40028 KB Output is correct
5 Correct 8 ms 40028 KB Output is correct
6 Correct 7 ms 40028 KB Output is correct
7 Correct 7 ms 40028 KB Output is correct
8 Correct 6 ms 40024 KB Output is correct
9 Correct 7 ms 40004 KB Output is correct
10 Correct 6 ms 39892 KB Output is correct
11 Correct 7 ms 40028 KB Output is correct
12 Correct 8 ms 39864 KB Output is correct
13 Correct 10 ms 40028 KB Output is correct
14 Correct 9 ms 40152 KB Output is correct
15 Correct 8 ms 40108 KB Output is correct
16 Correct 10 ms 40028 KB Output is correct
17 Correct 10 ms 40212 KB Output is correct
18 Correct 9 ms 40220 KB Output is correct
19 Correct 10 ms 40028 KB Output is correct
20 Correct 8 ms 40164 KB Output is correct
21 Correct 8 ms 40052 KB Output is correct
22 Correct 10 ms 40140 KB Output is correct
23 Correct 9 ms 40068 KB Output is correct
24 Correct 9 ms 40024 KB Output is correct
25 Correct 132 ms 44632 KB Output is correct
26 Correct 123 ms 44572 KB Output is correct
27 Correct 154 ms 44960 KB Output is correct
28 Correct 116 ms 44372 KB Output is correct
29 Correct 207 ms 52416 KB Output is correct
30 Correct 169 ms 49352 KB Output is correct
31 Correct 145 ms 55324 KB Output is correct
32 Correct 152 ms 48204 KB Output is correct
33 Correct 119 ms 48476 KB Output is correct
34 Correct 175 ms 50132 KB Output is correct
35 Correct 174 ms 50104 KB Output is correct
36 Correct 148 ms 49400 KB Output is correct
37 Correct 226 ms 52920 KB Output is correct
38 Correct 207 ms 45648 KB Output is correct
39 Correct 164 ms 55948 KB Output is correct
40 Correct 217 ms 55280 KB Output is correct
41 Correct 207 ms 55280 KB Output is correct
42 Correct 217 ms 50940 KB Output is correct
43 Correct 227 ms 50756 KB Output is correct
44 Correct 338 ms 51980 KB Output is correct
45 Correct 236 ms 45892 KB Output is correct
46 Correct 201 ms 43556 KB Output is correct
47 Correct 218 ms 42272 KB Output is correct
48 Correct 130 ms 41968 KB Output is correct
49 Correct 175 ms 41356 KB Output is correct
50 Correct 182 ms 51016 KB Output is correct
51 Correct 10 ms 40028 KB Output is correct
52 Correct 10 ms 40028 KB Output is correct
53 Correct 254 ms 52404 KB Output is correct
54 Correct 266 ms 54356 KB Output is correct
55 Correct 285 ms 52568 KB Output is correct
56 Correct 281 ms 54256 KB Output is correct
57 Correct 7 ms 39868 KB Output is correct
58 Correct 10 ms 40168 KB Output is correct
59 Correct 185 ms 49352 KB Output is correct
60 Correct 283 ms 49972 KB Output is correct
61 Correct 298 ms 50332 KB Output is correct
62 Correct 272 ms 50084 KB Output is correct
63 Correct 224 ms 45144 KB Output is correct
64 Correct 278 ms 45520 KB Output is correct
65 Correct 244 ms 45312 KB Output is correct
66 Correct 255 ms 53076 KB Output is correct
67 Correct 256 ms 50000 KB Output is correct
68 Correct 221 ms 51004 KB Output is correct
69 Correct 230 ms 55092 KB Output is correct
70 Correct 235 ms 50644 KB Output is correct
71 Correct 301 ms 50864 KB Output is correct