oj.uz

Submission #276420

# Submission time Handle Problem Language Result Execution time Memory
276420 2020-08-20T12:43:48 Z toonewbie Xylophone (JOI18_xylophone) C++17
100 / 100
 93 ms 632 KB 
#include "xylophone.h"
#include <bits/stdc++.h>
using namespace std;
int A[5001];
int pos[5001];
void solve(int N) {
    int id;
    int l = 1, r = N;
    while(r - l >= 0) {
        int mid = (l + r) >> 1;
        if (query(mid, N) != N - 1) {
            id = mid - 1;
            r = mid - 1;
        } else {
            l = mid + 1;
        }
    }
    A[id] = 1;
    pos[1] = id;
    if (id > 1) {
        A[id - 1] = 1 + query(id - 1, id);
        pos[A[id - 1]] = id - 1;
    }
    A[id + 1] = 1 + query(id, id + 1);
    pos[A[id + 1]] = id + 1;
    for (int j = id - 2; j >= 1; j--) {
        int dif = query(j, j + 1), sgn;
        if (A[j + 1] + dif > N || pos[A[j + 1] + dif]) sgn = -1;
        else if (A[j + 1] - dif <= 0 || pos[A[j + 1] - dif]) sgn = 1;
        else if (max({A[j + 1] + dif, A[j + 1], A[j + 2]}) - min({A[j + 1] + dif, A[j + 1], A[j + 2]}) == query(j, j + 2)) sgn = 1;
        else sgn = -1;
        A[j] = A[j + 1] + sgn * dif;
        pos[A[j]] = j;
    }
    for (int j = id + 2; j <= N; j++) {
        int dif = query(j - 1, j), sgn;
        if (A[j - 1] + dif > N || pos[A[j - 1] + dif]) sgn = -1;
        else if (A[j - 1] - dif <= 0 || pos[A[j - 1] - dif]) sgn = 1;
        else if (max({A[j - 1] + dif, A[j - 1], A[j - 2]}) - min({A[j - 1] + dif, A[j - 1], A[j - 2]}) == query(j - 2, j)) sgn = 1;
        else sgn = -1;
        A[j] = A[j - 1] + sgn * dif;
        pos[A[j]] = j;
    }
    for (int i = 1; i <= N; i++) {
        answer(pos[i], i);
    }
}

Compilation message

xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:21:30: warning: 'id' may be used uninitialized in this function [-Wmaybe-uninitialized]
   21 |         A[id - 1] = 1 + query(id - 1, id);
      |                         ~~~~~^~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 1 ms 380 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 1 ms 376 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 2 ms 256 KB Output is correct

Subtask #2
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 1 ms 380 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 1 ms 376 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 2 ms 256 KB Output is correct
16 Correct 3 ms 256 KB Output is correct
17 Correct 7 ms 384 KB Output is correct
18 Correct 16 ms 376 KB Output is correct
19 Correct 19 ms 384 KB Output is correct
20 Correct 20 ms 384 KB Output is correct
21 Correct 19 ms 384 KB Output is correct
22 Correct 12 ms 384 KB Output is correct
23 Correct 16 ms 384 KB Output is correct
24 Correct 15 ms 256 KB Output is correct
25 Correct 9 ms 384 KB Output is correct
26 Correct 21 ms 384 KB Output is correct
27 Correct 21 ms 376 KB Output is correct
28 Correct 18 ms 384 KB Output is correct
29 Correct 16 ms 380 KB Output is correct
30 Correct 18 ms 384 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 1 ms 380 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 1 ms 376 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 2 ms 256 KB Output is correct
16 Correct 3 ms 256 KB Output is correct
17 Correct 7 ms 384 KB Output is correct
18 Correct 16 ms 376 KB Output is correct
19 Correct 19 ms 384 KB Output is correct
20 Correct 20 ms 384 KB Output is correct
21 Correct 19 ms 384 KB Output is correct
22 Correct 12 ms 384 KB Output is correct
23 Correct 16 ms 384 KB Output is correct
24 Correct 15 ms 256 KB Output is correct
25 Correct 9 ms 384 KB Output is correct
26 Correct 21 ms 384 KB Output is correct
27 Correct 21 ms 376 KB Output is correct
28 Correct 18 ms 384 KB Output is correct
29 Correct 16 ms 380 KB Output is correct
30 Correct 18 ms 384 KB Output is correct
31 Correct 43 ms 384 KB Output is correct
32 Correct 33 ms 504 KB Output is correct
33 Correct 64 ms 504 KB Output is correct
34 Correct 48 ms 384 KB Output is correct
35 Correct 83 ms 384 KB Output is correct
36 Correct 53 ms 384 KB Output is correct
37 Correct 78 ms 632 KB Output is correct
38 Correct 27 ms 384 KB Output is correct
39 Correct 50 ms 528 KB Output is correct
40 Correct 93 ms 384 KB Output is correct
41 Correct 49 ms 516 KB Output is correct
42 Correct 47 ms 384 KB Output is correct
43 Correct 47 ms 504 KB Output is correct
44 Correct 49 ms 504 KB Output is correct
45 Correct 62 ms 384 KB Output is correct
46 Correct 58 ms 384 KB Output is correct
47 Correct 66 ms 512 KB Output is correct
48 Correct 62 ms 504 KB Output is correct
49 Correct 63 ms 384 KB Output is correct
50 Correct 61 ms 512 KB Output is correct
51 Correct 59 ms 384 KB Output is correct
52 Correct 60 ms 384 KB Output is correct
53 Correct 61 ms 384 KB Output is correct
54 Correct 56 ms 504 KB Output is correct
55 Correct 66 ms 384 KB Output is correct
56 Correct 65 ms 504 KB Output is correct
57 Correct 71 ms 384 KB Output is correct
58 Correct 79 ms 504 KB Output is correct
59 Correct 55 ms 504 KB Output is correct
60 Correct 61 ms 528 KB Output is correct