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Submission #230588

# Submission time Handle Problem Language Result Execution time Memory
230588 2020-05-10T13:42:03 Z Dilshod_Imomov Xylophone (JOI18_xylophone) C++17
100 / 100
 89 ms 416 KB 
#include "xylophone.h"
#include <bits/stdc++.h>
using namespace std;

void solve(int n) {
	int l = 1, r = n, ind = 0, md;
	while ( l <= r ) {
		md = (l + r) / 2;
		if ( query( md, n ) == n - 1 ) {
			l = md + 1;
			ind = md;
		}
		else {
			r = md - 1;
		}
	}
	vector < int > a( n + 1 ), used(n + 1);
	a[ind] = 1;
	answer( ind, 1 );
	used[1] = 1;
	if ( ind + 1 <= n ) {
		int x = query( ind, ind + 1 );
		a[ind + 1] = x + 1;
		answer( ind + 1, x + 1 );
		used[x + 1] = 1;
	}
	if ( ind - 1 > 0 ) {
		int x = query( ind - 1, ind );
		a[ind - 1] = x + 1;
		answer( ind - 1, x + 1 );
		used[x + 1] = 1;
	}
	for ( int i = ind + 2; i <= n; i++ ) {
		int x = a[ i - 1 ], y = a[i - 2];
		int d = query( i - 1, i );
		if ( x - d < 1 || used[x - d] ) {
			a[i] = x + d;
			answer( i, x + d );
			used[x + d] = 1;
			continue;
		}
		if ( x + d > n || used[x + d] ) {
			a[i] = x - d;
			answer( i, x - d );
			used[x - d] = 1;
			continue;
		}
		int q = query( i - 2, i );
		int mx = max( { x, y, x - d } ), mn = min( { x, y, x - d } );
		if ( q == mx - mn ) {
			a[i] = x - d;
			answer( i, x - d );
			used[x - d] = 1;
		}
		else {
			a[i] = x + d;
			answer( i, x + d );
			used[x + d] = 1;
		}
	}
	for ( int i = ind - 2; i > 0; i-- ) {
		int x = a[ i + 1 ], y = a[i + 2];
		int d = query( i, i + 1 );
		if ( x - d < 1 || used[x - d] ) {
			a[i] = x + d;
			answer( i, x + d );
			used[x + d] = 1;
			continue;
		}
		if ( x + d > n ) {
			a[i] = x - d;
			answer( i, x - d );
			used[x - d] = 1;
			continue;
		}
		int q = query( i, i + 2 );
		int mx = max( { x, y, x - d } ), mn = min( { x, y, x - d } );
		if ( q == mx - mn ) {
			a[i] = x - d;
			answer( i, x - d );
			used[x - d] = 1;
		}
		else {
			a[i] = x + d;
			answer( i, x + d );
			used[x + d] = 1;
		}	
	}
}

Subtask #1
11.0 / 11.0

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

Subtask #2
36.0 / 36.0

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

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 256 KB Output is correct
2 Correct 4 ms 256 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 6 ms 384 KB Output is correct
6 Correct 6 ms 384 KB Output is correct
7 Correct 6 ms 256 KB Output is correct
8 Correct 5 ms 256 KB Output is correct
9 Correct 5 ms 256 KB Output is correct
10 Correct 6 ms 384 KB Output is correct
11 Correct 6 ms 256 KB Output is correct
12 Correct 6 ms 256 KB Output is correct
13 Correct 6 ms 256 KB Output is correct
14 Correct 6 ms 256 KB Output is correct
15 Correct 6 ms 256 KB Output is correct
16 Correct 8 ms 384 KB Output is correct
17 Correct 17 ms 256 KB Output is correct
18 Correct 13 ms 256 KB Output is correct
19 Correct 20 ms 256 KB Output is correct
20 Correct 22 ms 384 KB Output is correct
21 Correct 26 ms 256 KB Output is correct
22 Correct 19 ms 256 KB Output is correct
23 Correct 12 ms 256 KB Output is correct
24 Correct 18 ms 256 KB Output is correct
25 Correct 13 ms 256 KB Output is correct
26 Correct 22 ms 384 KB Output is correct
27 Correct 22 ms 256 KB Output is correct
28 Correct 18 ms 256 KB Output is correct
29 Correct 24 ms 384 KB Output is correct
30 Correct 19 ms 256 KB Output is correct
31 Correct 33 ms 384 KB Output is correct
32 Correct 48 ms 384 KB Output is correct
33 Correct 69 ms 384 KB Output is correct
34 Correct 55 ms 384 KB Output is correct
35 Correct 61 ms 384 KB Output is correct
36 Correct 47 ms 384 KB Output is correct
37 Correct 59 ms 384 KB Output is correct
38 Correct 50 ms 384 KB Output is correct
39 Correct 60 ms 384 KB Output is correct
40 Correct 75 ms 384 KB Output is correct
41 Correct 61 ms 384 KB Output is correct
42 Correct 53 ms 384 KB Output is correct
43 Correct 67 ms 384 KB Output is correct
44 Correct 61 ms 384 KB Output is correct
45 Correct 66 ms 384 KB Output is correct
46 Correct 70 ms 384 KB Output is correct
47 Correct 71 ms 384 KB Output is correct
48 Correct 63 ms 384 KB Output is correct
49 Correct 89 ms 384 KB Output is correct
50 Correct 75 ms 384 KB Output is correct
51 Correct 59 ms 384 KB Output is correct
52 Correct 63 ms 384 KB Output is correct
53 Correct 63 ms 384 KB Output is correct
54 Correct 60 ms 416 KB Output is correct
55 Correct 59 ms 384 KB Output is correct
56 Correct 67 ms 384 KB Output is correct
57 Correct 58 ms 384 KB Output is correct
58 Correct 70 ms 384 KB Output is correct
59 Correct 61 ms 384 KB Output is correct
60 Correct 85 ms 384 KB Output is correct