oj.uz

Submission #996111

# Submission time Handle Problem Language Result Execution time Memory
996111 2024-06-10T08:07:25 Z anHiep Xylophone (JOI18_xylophone) C++17
100 / 100
 232 ms 97624 KB 
#include "xylophone.h"
#include<bits/stdc++.h>

using namespace std;

static int a[5005];
static int d[5005][5005]; 

void solve(int n) {
	int dis = query(1, 2);
    for(int i=3; i<=n; i++) {
        d[i - 2][i] = query(i - 2, i);
        d[i - 1][i] = query(i - 1, i);
    }
    for(int i=1; i<=n; i++) {
        a[1] = i;
        for(int k=-1; k<=1; k+=2) {
            a[2] = a[1] + k*dis;
            for(int j=3; j<=n; j++) {
                int cal = max(a[j - 1], a[j - 2]) - min(a[j - 1], a[j - 2]);
                if(d[j - 2][j] == cal) {
                    if(a[j - 1] > a[j - 2]) a[j] = a[j - 1] - d[j - 1][j];
                    else a[j] = a[j - 1] + d[j - 1][j];
                }
                else {
                    if(a[j - 1] + d[j - 1][j] - min(a[j - 2], a[j - 1]) == d[j - 2][j]) a[j] = a[j - 1] + d[j - 1][j];
                    if(max(a[j - 2], a[j - 1]) - (a[j - 1] - d[j - 1][j]) == d[j - 2][j]) a[j] = a[j - 1] - d[j - 1][j];
                }
            }
            int mi = 1e9, mx = -1e9;
            long long sum = 0;
            for(int j=1; j<=n; j++) {
                mi = min(mi, a[j]);
                mx = max(mx, a[j]);
                sum += a[j];
            }
            if(mi == 1 && mx == n && sum == 1LL*n*(n + 1)/2) {
                int p1, pn;
                for(int j=1; j<=n; j++) {
                    if(a[j] == 1) p1 = j;
                    if(a[j] == n) pn = j;
                } 
                if(p1 < pn) {
                    for(int j=1; j<=n; j++) answer(j, a[j]);
                    return;
                }
            }
        }
    }
}

Compilation message

xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:43:17: warning: 'pn' may be used uninitialized in this function [-Wmaybe-uninitialized]
   43 |                 if(p1 < pn) {
      |                 ^~
xylophone.cpp:43:17: warning: 'p1' may be used uninitialized in this function [-Wmaybe-uninitialized]

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 344 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 2 ms 2392 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2648 KB Output is correct
9 Correct 1 ms 2504 KB Output is correct
10 Correct 2 ms 2392 KB Output is correct
11 Correct 1 ms 2516 KB Output is correct
12 Correct 2 ms 2392 KB Output is correct
13 Correct 2 ms 2392 KB Output is correct
14 Correct 2 ms 2392 KB Output is correct
15 Correct 2 ms 2392 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 344 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 2 ms 2392 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2648 KB Output is correct
9 Correct 1 ms 2504 KB Output is correct
10 Correct 2 ms 2392 KB Output is correct
11 Correct 1 ms 2516 KB Output is correct
12 Correct 2 ms 2392 KB Output is correct
13 Correct 2 ms 2392 KB Output is correct
14 Correct 2 ms 2392 KB Output is correct
15 Correct 2 ms 2392 KB Output is correct
16 Correct 3 ms 6484 KB Output is correct
17 Correct 9 ms 10584 KB Output is correct
18 Correct 8 ms 16728 KB Output is correct
19 Correct 15 ms 21224 KB Output is correct
20 Correct 18 ms 21080 KB Output is correct
21 Correct 16 ms 20988 KB Output is correct
22 Correct 15 ms 20824 KB Output is correct
23 Correct 13 ms 21080 KB Output is correct
24 Correct 10 ms 20824 KB Output is correct
25 Correct 8 ms 20824 KB Output is correct
26 Correct 16 ms 20964 KB Output is correct
27 Correct 14 ms 21080 KB Output is correct
28 Correct 12 ms 20968 KB Output is correct
29 Correct 13 ms 20824 KB Output is correct
30 Correct 12 ms 20824 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 344 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 2 ms 2392 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2648 KB Output is correct
9 Correct 1 ms 2504 KB Output is correct
10 Correct 2 ms 2392 KB Output is correct
11 Correct 1 ms 2516 KB Output is correct
12 Correct 2 ms 2392 KB Output is correct
13 Correct 2 ms 2392 KB Output is correct
14 Correct 2 ms 2392 KB Output is correct
15 Correct 2 ms 2392 KB Output is correct
16 Correct 3 ms 6484 KB Output is correct
17 Correct 9 ms 10584 KB Output is correct
18 Correct 8 ms 16728 KB Output is correct
19 Correct 15 ms 21224 KB Output is correct
20 Correct 18 ms 21080 KB Output is correct
21 Correct 16 ms 20988 KB Output is correct
22 Correct 15 ms 20824 KB Output is correct
23 Correct 13 ms 21080 KB Output is correct
24 Correct 10 ms 20824 KB Output is correct
25 Correct 8 ms 20824 KB Output is correct
26 Correct 16 ms 20964 KB Output is correct
27 Correct 14 ms 21080 KB Output is correct
28 Correct 12 ms 20968 KB Output is correct
29 Correct 13 ms 20824 KB Output is correct
30 Correct 12 ms 20824 KB Output is correct
31 Correct 44 ms 43344 KB Output is correct
32 Correct 94 ms 62004 KB Output is correct
33 Correct 107 ms 86556 KB Output is correct
34 Correct 170 ms 96984 KB Output is correct
35 Correct 173 ms 97532 KB Output is correct
36 Correct 60 ms 97624 KB Output is correct
37 Correct 162 ms 97120 KB Output is correct
38 Correct 59 ms 97124 KB Output is correct
39 Correct 85 ms 97040 KB Output is correct
40 Correct 128 ms 97284 KB Output is correct
41 Correct 181 ms 97148 KB Output is correct
42 Correct 50 ms 97364 KB Output is correct
43 Correct 161 ms 97288 KB Output is correct
44 Correct 75 ms 97572 KB Output is correct
45 Correct 129 ms 97392 KB Output is correct
46 Correct 198 ms 97456 KB Output is correct
47 Correct 215 ms 97384 KB Output is correct
48 Correct 62 ms 97580 KB Output is correct
49 Correct 220 ms 97404 KB Output is correct
50 Correct 210 ms 97104 KB Output is correct
51 Correct 111 ms 97384 KB Output is correct
52 Correct 86 ms 97084 KB Output is correct
53 Correct 211 ms 97104 KB Output is correct
54 Correct 170 ms 97256 KB Output is correct
55 Correct 180 ms 97192 KB Output is correct
56 Correct 206 ms 97400 KB Output is correct
57 Correct 224 ms 97104 KB Output is correct
58 Correct 232 ms 97104 KB Output is correct
59 Correct 162 ms 97468 KB Output is correct
60 Correct 144 ms 97360 KB Output is correct