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Submission #1114474

# Submission time Handle Problem Language Result Execution time Memory
1114474 2024-11-19T01:13:47 Z dynam1c Sprinklers (CEOI24_sprinklers) C++17
26 / 100
 102 ms 2340 KB 
#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, m;
  cin >> n >> m;
  vector<int> s(n), f(m);
  for (int& e : s)
    cin >> e;
  for (int& e : f)
    cin >> e;

  vector<char> d(n);
  auto check = [&](int k) {
    d.assign(n, 0);
    int x = -1;
    int j = 0, pj = 0;
    for (int i = 0; i < n; i++) {
      if (s[i] <= x)
        x = s[i]+k, d[i] = 'R';
      else if (j < m && f[j] < s[i]) {
        if (s[i]-f[j] > k)
          return false;
        x = s[i], d[i] = 'L';
        if (i > 0 && d[i-1] == 'L' && s[i]-k <= f[pj]) {
          x = s[i-1]+k;
          d[i-1] = 'R';
        }
      } else
        x = s[i]+k, d[i] = 'R';
      pj = j;
      while (j < m && f[j] <= x)
        j++;
    }
    return j == m;
  };

  if (!check(1e9)) {
    cout << -1 << endl;
    return 0;
  }

  int l = -1, r = 1e9;
  while (r-l > 1) {
    int m = (l+r)/2;
    if (check(m))
      r = m;
    else
      l = m;
  }

  check(r);

  for (int i = 0; i < n; i++)
    if (d[i] == 'L')
      s[i] -= r;
  sort(s.begin(), s.end());
  int j = 0;
  for (int e : s) {
    if (j == m)
      break;
    assert(e <= f[j]);
    while (j < m && f[j] <= e+r)
      j++;
  }
  //assert(j == m);

  cout << r << endl;
  for (char c : d)
    cout << c;
  cout << endl;
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Correct
2 Correct 1 ms 336 KB Correct

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Correct
2 Correct 23 ms 592 KB Correct
3 Correct 1 ms 336 KB Correct
4 Correct 26 ms 592 KB Correct
5 Correct 29 ms 592 KB Correct
6 Correct 1 ms 336 KB Correct
7 Correct 1 ms 336 KB Correct
8 Correct 6 ms 336 KB Correct
9 Correct 1 ms 336 KB Correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Correct
2 Correct 26 ms 592 KB Correct
3 Correct 6 ms 336 KB Correct
4 Correct 64 ms 1212 KB Correct
5 Correct 70 ms 1204 KB Correct
6 Correct 1 ms 336 KB Correct
7 Correct 1 ms 336 KB Correct
8 Correct 58 ms 1208 KB Correct
9 Correct 60 ms 1352 KB Correct
10 Correct 61 ms 1352 KB Correct
11 Correct 34 ms 848 KB Correct
12 Correct 39 ms 1016 KB Correct
13 Correct 47 ms 1104 KB Correct
14 Correct 58 ms 1176 KB Correct
15 Correct 56 ms 1096 KB Correct
16 Correct 43 ms 1096 KB Correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Correct
2 Correct 1 ms 336 KB Correct
3 Correct 1 ms 336 KB Correct
4 Correct 1 ms 336 KB Correct
5 Correct 1 ms 336 KB Correct
6 Correct 1 ms 336 KB Correct
7 Correct 1 ms 336 KB Correct
8 Correct 1 ms 336 KB Correct
9 Correct 1 ms 336 KB Correct
10 Correct 1 ms 504 KB Correct
11 Correct 1 ms 336 KB Correct
12 Correct 1 ms 336 KB Correct
13 Correct 1 ms 336 KB Correct
14 Correct 1 ms 336 KB Correct
15 Correct 1 ms 500 KB Correct
16 Correct 1 ms 336 KB Correct
17 Correct 1 ms 336 KB Correct
18 Correct 1 ms 336 KB Correct
19 Correct 1 ms 336 KB Correct
20 Correct 1 ms 336 KB Correct

Subtask #4
0.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Correct
2 Correct 31 ms 848 KB Correct
3 Correct 85 ms 1352 KB Correct
4 Correct 84 ms 1352 KB Correct
5 Correct 82 ms 1352 KB Correct
6 Correct 86 ms 1352 KB Correct
7 Correct 87 ms 1352 KB Correct
8 Correct 87 ms 1352 KB Correct
9 Correct 85 ms 1360 KB Correct
10 Correct 90 ms 1352 KB Correct
11 Correct 102 ms 1352 KB Correct
12 Correct 1 ms 336 KB Correct
13 Correct 1 ms 440 KB Correct
14 Correct 38 ms 824 KB Correct
15 Correct 38 ms 848 KB Correct
16 Correct 36 ms 848 KB Correct
17 Correct 31 ms 1352 KB Correct
18 Correct 35 ms 1360 KB Correct
19 Correct 42 ms 1364 KB Correct
20 Correct 69 ms 1352 KB Correct
21 Runtime error 64 ms 2340 KB Execution killed with signal 6
22 Halted 0 ms 0 KB -

Subtask #5
0.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Correct
2 Correct 1 ms 336 KB Correct
3 Correct 23 ms 592 KB Correct
4 Correct 1 ms 336 KB Correct
5 Correct 26 ms 592 KB Correct
6 Correct 29 ms 592 KB Correct
7 Correct 1 ms 336 KB Correct
8 Correct 1 ms 336 KB Correct
9 Correct 6 ms 336 KB Correct
10 Correct 1 ms 336 KB Correct
11 Correct 26 ms 592 KB Correct
12 Correct 6 ms 336 KB Correct
13 Correct 64 ms 1212 KB Correct
14 Correct 70 ms 1204 KB Correct
15 Correct 1 ms 336 KB Correct
16 Correct 1 ms 336 KB Correct
17 Correct 58 ms 1208 KB Correct
18 Correct 60 ms 1352 KB Correct
19 Correct 61 ms 1352 KB Correct
20 Correct 34 ms 848 KB Correct
21 Correct 39 ms 1016 KB Correct
22 Correct 47 ms 1104 KB Correct
23 Correct 58 ms 1176 KB Correct
24 Correct 56 ms 1096 KB Correct
25 Correct 43 ms 1096 KB Correct
26 Correct 1 ms 336 KB Correct
27 Correct 1 ms 336 KB Correct
28 Correct 1 ms 336 KB Correct
29 Correct 1 ms 336 KB Correct
30 Correct 1 ms 336 KB Correct
31 Correct 1 ms 336 KB Correct
32 Correct 1 ms 336 KB Correct
33 Correct 1 ms 504 KB Correct
34 Correct 1 ms 336 KB Correct
35 Correct 1 ms 336 KB Correct
36 Correct 1 ms 336 KB Correct
37 Correct 1 ms 336 KB Correct
38 Correct 1 ms 500 KB Correct
39 Correct 1 ms 336 KB Correct
40 Correct 1 ms 336 KB Correct
41 Correct 1 ms 336 KB Correct
42 Correct 1 ms 336 KB Correct
43 Correct 1 ms 336 KB Correct
44 Correct 31 ms 848 KB Correct
45 Correct 85 ms 1352 KB Correct
46 Correct 84 ms 1352 KB Correct
47 Correct 82 ms 1352 KB Correct
48 Correct 86 ms 1352 KB Correct
49 Correct 87 ms 1352 KB Correct
50 Correct 87 ms 1352 KB Correct
51 Correct 85 ms 1360 KB Correct
52 Correct 90 ms 1352 KB Correct
53 Correct 102 ms 1352 KB Correct
54 Correct 1 ms 336 KB Correct
55 Correct 1 ms 440 KB Correct
56 Correct 38 ms 824 KB Correct
57 Correct 38 ms 848 KB Correct
58 Correct 36 ms 848 KB Correct
59 Correct 31 ms 1352 KB Correct
60 Correct 35 ms 1360 KB Correct
61 Correct 42 ms 1364 KB Correct
62 Correct 69 ms 1352 KB Correct
63 Runtime error 64 ms 2340 KB Execution killed with signal 6
64 Halted 0 ms 0 KB -