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Submission #572576

# Submission time Handle Problem Language Result Execution time Memory
572576 2022-06-04T17:19:50 Z model_code Event Hopping (BOI22_events) C++17
100 / 100
 540 ms 25812 KB 
#include <bits/stdc++.h>
#define st first
#define nd second
using namespace std;
const int LG = 17;

int main() {
  int n, q; cin >> n >> q;
  vector<vector<int>> nx(LG);
  vector<vector<pair<int, int>>> rmq(LG);
  for (int i = 0; i < LG; i++)
    nx[i].resize(n), rmq[i].resize(n, {1'000'000'001, -1});
  vector<pair<int, int>> a(n);
  vector<int> b;
  for (int i = 0; i < n; i++) {
    cin >> a[i].st >> a[i].nd;
    b.push_back(a[i].nd);
  }
  sort(b.begin(), b.end());
  b.erase(unique(b.begin(), b.end()), b.end());
  for (int i = 0; i < n; i++) {
    int r = lower_bound(b.begin(), b.end(), a[i].nd) - b.begin();
    rmq[0][r] = min(rmq[0][r], {a[i].st, i});
  }
  for (int i = 0; i + 1 < LG; i++)
    for (int j = 0; j + (1 << (i + 1)) <= n; j++)
      rmq[i + 1][j] = min(rmq[i][j], rmq[i][j + (1 << i)]);
  for (int i = 0; i < n; i++) {
    int l = lower_bound(b.begin(), b.end(), a[i].st) - b.begin();
    int r = lower_bound(b.begin(), b.end(), a[i].nd) - b.begin();
    int h = 31 - __builtin_clz(r - l + 1);
    nx[0][i] = min(rmq[h][l], rmq[h][r + 1 - (1 << h)]).nd;
  }
  for (int i = 0; i + 1 < LG; i++)
    for (int j = 0; j < n; j++)
      nx[i + 1][j] = nx[i][nx[i][j]];
  while (q--) {
    int x, y, l = 1; cin >> x >> y; x--, y--;
    if (x == y || (a[y].st <= a[x].nd && a[x].nd <= a[y].nd)) {
      cout << (x == y ? 0 : 1) << "\n";
      continue;
    }
    for (int i = LG - 1; ~i; i--) {
      if (a[x].nd < a[nx[i][y]].st)
        l += 1 << i, y = nx[i][y];
    }
    y = nx[0][y];
    if (a[x].nd < a[y].st || a[x].nd > a[y].nd)
      cout << "impossible\n";
    else
      cout << l + (a[x].nd >= a[y].st) << "\n";
  }
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 386 ms 25344 KB Output is correct
3 Correct 386 ms 25316 KB Output is correct
4 Correct 507 ms 25220 KB Output is correct
5 Correct 424 ms 25364 KB Output is correct
6 Correct 475 ms 25428 KB Output is correct
7 Correct 410 ms 25396 KB Output is correct
8 Correct 435 ms 25712 KB Output is correct
9 Correct 442 ms 25736 KB Output is correct
10 Correct 484 ms 25664 KB Output is correct
11 Correct 492 ms 25716 KB Output is correct
12 Correct 297 ms 24972 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 520 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 520 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 2 ms 520 KB Output is correct
13 Correct 2 ms 532 KB Output is correct
14 Correct 4 ms 468 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 3 ms 524 KB Output is correct
17 Correct 3 ms 468 KB Output is correct
18 Correct 2 ms 468 KB Output is correct
19 Correct 206 ms 2748 KB Output is correct
20 Correct 249 ms 2796 KB Output is correct
21 Correct 233 ms 3084 KB Output is correct
22 Correct 202 ms 3108 KB Output is correct
23 Correct 234 ms 2964 KB Output is correct
24 Correct 200 ms 3044 KB Output is correct
25 Correct 228 ms 2672 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 520 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 3 ms 468 KB Output is correct
13 Correct 2 ms 528 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 3 ms 520 KB Output is correct
16 Correct 2 ms 468 KB Output is correct
17 Correct 2 ms 528 KB Output is correct
18 Correct 3 ms 520 KB Output is correct
19 Correct 176 ms 23572 KB Output is correct
20 Correct 121 ms 22764 KB Output is correct
21 Correct 158 ms 23468 KB Output is correct
22 Correct 163 ms 23456 KB Output is correct
23 Correct 180 ms 23496 KB Output is correct
24 Correct 163 ms 23604 KB Output is correct
25 Correct 95 ms 22828 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 425 ms 25328 KB Output is correct
2 Correct 371 ms 25280 KB Output is correct
3 Correct 503 ms 25304 KB Output is correct
4 Correct 458 ms 25768 KB Output is correct
5 Correct 432 ms 25620 KB Output is correct
6 Correct 540 ms 25356 KB Output is correct
7 Correct 438 ms 25376 KB Output is correct
8 Correct 398 ms 25504 KB Output is correct
9 Correct 132 ms 23648 KB Output is correct
10 Correct 354 ms 25072 KB Output is correct
11 Correct 316 ms 25020 KB Output is correct
12 Correct 373 ms 25052 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 386 ms 25344 KB Output is correct
3 Correct 386 ms 25316 KB Output is correct
4 Correct 507 ms 25220 KB Output is correct
5 Correct 424 ms 25364 KB Output is correct
6 Correct 475 ms 25428 KB Output is correct
7 Correct 410 ms 25396 KB Output is correct
8 Correct 435 ms 25712 KB Output is correct
9 Correct 442 ms 25736 KB Output is correct
10 Correct 484 ms 25664 KB Output is correct
11 Correct 492 ms 25716 KB Output is correct
12 Correct 297 ms 24972 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 2 ms 468 KB Output is correct
17 Correct 2 ms 468 KB Output is correct
18 Correct 2 ms 468 KB Output is correct
19 Correct 2 ms 468 KB Output is correct
20 Correct 2 ms 468 KB Output is correct
21 Correct 2 ms 520 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 2 ms 520 KB Output is correct
25 Correct 2 ms 532 KB Output is correct
26 Correct 4 ms 468 KB Output is correct
27 Correct 3 ms 468 KB Output is correct
28 Correct 3 ms 524 KB Output is correct
29 Correct 3 ms 468 KB Output is correct
30 Correct 2 ms 468 KB Output is correct
31 Correct 206 ms 2748 KB Output is correct
32 Correct 249 ms 2796 KB Output is correct
33 Correct 233 ms 3084 KB Output is correct
34 Correct 202 ms 3108 KB Output is correct
35 Correct 234 ms 2964 KB Output is correct
36 Correct 200 ms 3044 KB Output is correct
37 Correct 228 ms 2672 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 0 ms 212 KB Output is correct
40 Correct 3 ms 468 KB Output is correct
41 Correct 2 ms 528 KB Output is correct
42 Correct 2 ms 468 KB Output is correct
43 Correct 3 ms 520 KB Output is correct
44 Correct 2 ms 468 KB Output is correct
45 Correct 2 ms 528 KB Output is correct
46 Correct 3 ms 520 KB Output is correct
47 Correct 176 ms 23572 KB Output is correct
48 Correct 121 ms 22764 KB Output is correct
49 Correct 158 ms 23468 KB Output is correct
50 Correct 163 ms 23456 KB Output is correct
51 Correct 180 ms 23496 KB Output is correct
52 Correct 163 ms 23604 KB Output is correct
53 Correct 95 ms 22828 KB Output is correct
54 Correct 425 ms 25328 KB Output is correct
55 Correct 371 ms 25280 KB Output is correct
56 Correct 503 ms 25304 KB Output is correct
57 Correct 458 ms 25768 KB Output is correct
58 Correct 432 ms 25620 KB Output is correct
59 Correct 540 ms 25356 KB Output is correct
60 Correct 438 ms 25376 KB Output is correct
61 Correct 398 ms 25504 KB Output is correct
62 Correct 132 ms 23648 KB Output is correct
63 Correct 354 ms 25072 KB Output is correct
64 Correct 316 ms 25020 KB Output is correct
65 Correct 373 ms 25052 KB Output is correct
66 Correct 0 ms 212 KB Output is correct
67 Correct 309 ms 25296 KB Output is correct
68 Correct 347 ms 25336 KB Output is correct
69 Correct 371 ms 25276 KB Output is correct
70 Correct 416 ms 25464 KB Output is correct
71 Correct 329 ms 25304 KB Output is correct
72 Correct 398 ms 25628 KB Output is correct
73 Correct 338 ms 25764 KB Output is correct
74 Correct 403 ms 25768 KB Output is correct
75 Correct 342 ms 25676 KB Output is correct
76 Correct 378 ms 25812 KB Output is correct
77 Correct 258 ms 25012 KB Output is correct
78 Correct 1 ms 212 KB Output is correct
79 Correct 2 ms 468 KB Output is correct
80 Correct 2 ms 468 KB Output is correct
81 Correct 2 ms 468 KB Output is correct
82 Correct 2 ms 524 KB Output is correct
83 Correct 2 ms 528 KB Output is correct
84 Correct 2 ms 468 KB Output is correct
85 Correct 1 ms 468 KB Output is correct
86 Correct 181 ms 2804 KB Output is correct
87 Correct 192 ms 2912 KB Output is correct
88 Correct 188 ms 3088 KB Output is correct
89 Correct 179 ms 3204 KB Output is correct
90 Correct 193 ms 3028 KB Output is correct
91 Correct 172 ms 2928 KB Output is correct
92 Correct 177 ms 2772 KB Output is correct
93 Correct 135 ms 23572 KB Output is correct
94 Correct 104 ms 22832 KB Output is correct
95 Correct 124 ms 23468 KB Output is correct
96 Correct 130 ms 23560 KB Output is correct
97 Correct 142 ms 23432 KB Output is correct
98 Correct 143 ms 23560 KB Output is correct
99 Correct 76 ms 22852 KB Output is correct
100 Correct 350 ms 25432 KB Output is correct
101 Correct 374 ms 25444 KB Output is correct
102 Correct 358 ms 25528 KB Output is correct
103 Correct 351 ms 25096 KB Output is correct
104 Correct 320 ms 24864 KB Output is correct
105 Correct 339 ms 25112 KB Output is correct
106 Correct 325 ms 24748 KB Output is correct
107 Correct 360 ms 24760 KB Output is correct
108 Correct 348 ms 25380 KB Output is correct
109 Correct 336 ms 25412 KB Output is correct
110 Correct 361 ms 25452 KB Output is correct
111 Correct 333 ms 25280 KB Output is correct