oj.uz

Submission #855235

# Submission time Handle Problem Language Result Execution time Memory
855235 2023-10-01T01:46:55 Z NeroZein Xylophone (JOI18_xylophone) C++17
100 / 100
 38 ms 1192 KB 
#include "xylophone.h"
#include "bits/stdc++.h"

using namespace std; 

static int A[5001];
static bool Used[5001];

void solve(int N) {
  int l = 1, r = N - 1;
  while (l < r) {
    int mid = (l + r + 1) >> 1;
    if (query(mid, N) == N - 1) {
      l = mid;
    } else {
      r = mid - 1; 
    }
  }
  A[l] = 1;
  A[l + 1] = query(l, l + 1) + 1; 
  Used[A[l]] = Used[A[l + 1]] = true; 
  for (int i = l + 2; i <= N; ++i) {
    int diff = query(i - 1, i); 
    bool pre = A[i - 1] - diff > 1 && !Used[A[i - 1] - diff]; 
    bool aft = A[i - 1] + diff <= N && !Used[A[i - 1] + diff];
    if (pre && aft) {
      int diff2 = query(i - 2, i); 
      if (A[i - 2] < A[i - 1]) {
        if (diff2 == A[i - 1] - A[i - 2] + diff) {
          A[i] = A[i - 1] + diff; 
        } else {
          A[i] = A[i - 1] - diff; 
        }
      } else {
        if (diff2 == A[i - 2] - A[i - 1] + diff) {
          A[i] = A[i - 1] - diff; 
        } else {
          A[i] = A[i - 1] + diff; 
        }
      }
    } else if (pre) {
      A[i] = A[i - 1] - diff; 
    } else {
      A[i] = A[i - 1] + diff; 
    }
    Used[A[i]] = true; 
  }
  if (l > 1) {
    A[l - 1] = query(l - 1, l) + 1; 
    Used[A[l - 1]] = true; 
    for (int i = l - 2; i > 0; --i) {
      int diff = query(i, i + 1); 
      bool pre = A[i + 1] - diff > 1 && !Used[A[i + 1] - diff]; 
      bool aft = A[i + 1] + diff <= N && !Used[A[i + 1] + diff];
      if (pre && aft) {
        int diff2 = query(i, i + 2); 
        if (A[i + 2] < A[i + 1]) {
          if (diff2 == A[i + 1] - A[i + 2] + diff) {
            A[i] = A[i + 1] + diff; 
          } else {
            A[i] = A[i + 1] - diff; 
          }
        } else {
          if (diff2 == A[i + 2] - A[i + 1] + diff) {
            A[i] = A[i + 1] - diff; 
          } else {
            A[i] = A[i + 1] + diff; 
          }
        }
      } else if (pre) {
        A[i] = A[i + 1] - diff; 
      } else {
        A[i] = A[i + 1] + diff; 
      }
      Used[A[i]] = true; 
    }
  }
  for (int i = 1; i <= N; ++i) {
    answer(i, A[i]); 
  }
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 688 KB Output is correct
3 Correct 0 ms 436 KB Output is correct
4 Correct 1 ms 608 KB Output is correct
5 Correct 1 ms 436 KB Output is correct
6 Correct 1 ms 440 KB Output is correct
7 Correct 1 ms 444 KB Output is correct
8 Correct 1 ms 440 KB Output is correct
9 Correct 1 ms 608 KB Output is correct
10 Correct 1 ms 444 KB Output is correct
11 Correct 1 ms 440 KB Output is correct
12 Correct 1 ms 440 KB Output is correct
13 Correct 1 ms 440 KB Output is correct
14 Correct 1 ms 440 KB Output is correct
15 Correct 1 ms 608 KB Output is correct

Subtask #2
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 688 KB Output is correct
3 Correct 0 ms 436 KB Output is correct
4 Correct 1 ms 608 KB Output is correct
5 Correct 1 ms 436 KB Output is correct
6 Correct 1 ms 440 KB Output is correct
7 Correct 1 ms 444 KB Output is correct
8 Correct 1 ms 440 KB Output is correct
9 Correct 1 ms 608 KB Output is correct
10 Correct 1 ms 444 KB Output is correct
11 Correct 1 ms 440 KB Output is correct
12 Correct 1 ms 440 KB Output is correct
13 Correct 1 ms 440 KB Output is correct
14 Correct 1 ms 440 KB Output is correct
15 Correct 1 ms 608 KB Output is correct
16 Correct 2 ms 440 KB Output is correct
17 Correct 3 ms 696 KB Output is correct
18 Correct 4 ms 700 KB Output is correct
19 Correct 4 ms 696 KB Output is correct
20 Correct 5 ms 692 KB Output is correct
21 Correct 8 ms 692 KB Output is correct
22 Correct 5 ms 948 KB Output is correct
23 Correct 4 ms 452 KB Output is correct
24 Correct 4 ms 688 KB Output is correct
25 Correct 4 ms 692 KB Output is correct
26 Correct 5 ms 456 KB Output is correct
27 Correct 6 ms 448 KB Output is correct
28 Correct 5 ms 440 KB Output is correct
29 Correct 6 ms 692 KB Output is correct
30 Correct 9 ms 700 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 688 KB Output is correct
3 Correct 0 ms 436 KB Output is correct
4 Correct 1 ms 608 KB Output is correct
5 Correct 1 ms 436 KB Output is correct
6 Correct 1 ms 440 KB Output is correct
7 Correct 1 ms 444 KB Output is correct
8 Correct 1 ms 440 KB Output is correct
9 Correct 1 ms 608 KB Output is correct
10 Correct 1 ms 444 KB Output is correct
11 Correct 1 ms 440 KB Output is correct
12 Correct 1 ms 440 KB Output is correct
13 Correct 1 ms 440 KB Output is correct
14 Correct 1 ms 440 KB Output is correct
15 Correct 1 ms 608 KB Output is correct
16 Correct 2 ms 440 KB Output is correct
17 Correct 3 ms 696 KB Output is correct
18 Correct 4 ms 700 KB Output is correct
19 Correct 4 ms 696 KB Output is correct
20 Correct 5 ms 692 KB Output is correct
21 Correct 8 ms 692 KB Output is correct
22 Correct 5 ms 948 KB Output is correct
23 Correct 4 ms 452 KB Output is correct
24 Correct 4 ms 688 KB Output is correct
25 Correct 4 ms 692 KB Output is correct
26 Correct 5 ms 456 KB Output is correct
27 Correct 6 ms 448 KB Output is correct
28 Correct 5 ms 440 KB Output is correct
29 Correct 6 ms 692 KB Output is correct
30 Correct 9 ms 700 KB Output is correct
31 Correct 11 ms 704 KB Output is correct
32 Correct 17 ms 444 KB Output is correct
33 Correct 25 ms 704 KB Output is correct
34 Correct 28 ms 696 KB Output is correct
35 Correct 34 ms 956 KB Output is correct
36 Correct 22 ms 696 KB Output is correct
37 Correct 27 ms 696 KB Output is correct
38 Correct 24 ms 692 KB Output is correct
39 Correct 26 ms 948 KB Output is correct
40 Correct 29 ms 696 KB Output is correct
41 Correct 29 ms 704 KB Output is correct
42 Correct 21 ms 704 KB Output is correct
43 Correct 21 ms 956 KB Output is correct
44 Correct 22 ms 696 KB Output is correct
45 Correct 32 ms 700 KB Output is correct
46 Correct 33 ms 436 KB Output is correct
47 Correct 31 ms 700 KB Output is correct
48 Correct 38 ms 696 KB Output is correct
49 Correct 30 ms 704 KB Output is correct
50 Correct 31 ms 700 KB Output is correct
51 Correct 27 ms 700 KB Output is correct
52 Correct 25 ms 700 KB Output is correct
53 Correct 32 ms 696 KB Output is correct
54 Correct 27 ms 696 KB Output is correct
55 Correct 27 ms 1192 KB Output is correct
56 Correct 27 ms 700 KB Output is correct
57 Correct 26 ms 956 KB Output is correct
58 Correct 34 ms 452 KB Output is correct
59 Correct 29 ms 680 KB Output is correct
60 Correct 26 ms 952 KB Output is correct