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Submission #881948

# Submission time Handle Problem Language Result Execution time Memory
881948 2023-12-02T10:11:40 Z Alan Xylophone (JOI18_xylophone) C++17
100 / 100
 43 ms 636 KB 
#include <bits/stdc++.h>
using namespace std;

int query(int s, int t);
void answer(int i, int a);

void solve(int N) {
	vector<int> ans (N+1);
	vector<bool> used (N+1);
	int l = 1, r = N;
	while (l+1 < r) {
		int mid = (l+r)/2;
		if (query(mid, N) == N-1) l = mid;
		else r = mid;
	}
	ans[l] = 1;
	used[1] = true;
	if (l > 1) {
		ans[l-1] = ans[l] + query(l-1, l);
		used[ans[l-1]] = true;
	}
	if (l < N) {
		ans[l+1] = ans[l] + query(l, l+1);
		used[ans[l+1]] = true;
	}
	for (int i = l-2; i > 0; i--) {
		int q = query(i, i+1);
		if (ans[i+1] + q > N || used[ans[i+1] + q]) ans[i] = ans[i+1] - q;
		else if (ans[i+1] - q < 1 || used[ans[i+1] - q]) ans[i] = ans[i+1] + q;
		else {
			int q2 = query(i, i+2);
			ans[i] = ans[i+1] - q;
			if (abs(ans[i] - ans[i+1]) != q || max({ans[i], ans[i+1], ans[i+2]}) - min({ans[i], ans[i+1], ans[i+2]}) != q2) ans[i] = ans[i+1] + q;
		}
		used[ans[i]] = true;
	}
	for (int i = l+2; i <= N; i++) {
		int q = query(i-1, i);
		if (ans[i-1] + q > N || used[ans[i-1] + q]) ans[i] = ans[i-1] - q;
		else if (ans[i-1] - q < 1 || used[ans[i-1] - q]) ans[i] = ans[i-1] + q;
		else {
			int q2 = query(i-2, i);
			ans[i] = ans[i-1] - q;
			if (abs(ans[i] - ans[i-1]) != q || max({ans[i], ans[i-1], ans[i-2]}) - min({ans[i], ans[i-1], ans[i-2]}) != q2) ans[i] = ans[i-1] + q;
		}
		used[ans[i]] = true;
	}
	for (int i = 1; i <= N; i++) answer(i, ans[i]);
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 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 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 2 ms 344 KB Output is correct
18 Correct 4 ms 440 KB Output is correct
19 Correct 5 ms 436 KB Output is correct
20 Correct 5 ms 440 KB Output is correct
21 Correct 5 ms 440 KB Output is correct
22 Correct 5 ms 440 KB Output is correct
23 Correct 4 ms 440 KB Output is correct
24 Correct 4 ms 440 KB Output is correct
25 Correct 4 ms 440 KB Output is correct
26 Correct 5 ms 440 KB Output is correct
27 Correct 6 ms 600 KB Output is correct
28 Correct 6 ms 444 KB Output is correct
29 Correct 5 ms 436 KB Output is correct
30 Correct 5 ms 344 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 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 2 ms 344 KB Output is correct
18 Correct 4 ms 440 KB Output is correct
19 Correct 5 ms 436 KB Output is correct
20 Correct 5 ms 440 KB Output is correct
21 Correct 5 ms 440 KB Output is correct
22 Correct 5 ms 440 KB Output is correct
23 Correct 4 ms 440 KB Output is correct
24 Correct 4 ms 440 KB Output is correct
25 Correct 4 ms 440 KB Output is correct
26 Correct 5 ms 440 KB Output is correct
27 Correct 6 ms 600 KB Output is correct
28 Correct 6 ms 444 KB Output is correct
29 Correct 5 ms 436 KB Output is correct
30 Correct 5 ms 344 KB Output is correct
31 Correct 11 ms 448 KB Output is correct
32 Correct 21 ms 420 KB Output is correct
33 Correct 31 ms 444 KB Output is correct
34 Correct 26 ms 444 KB Output is correct
35 Correct 27 ms 448 KB Output is correct
36 Correct 20 ms 452 KB Output is correct
37 Correct 25 ms 636 KB Output is correct
38 Correct 21 ms 456 KB Output is correct
39 Correct 26 ms 448 KB Output is correct
40 Correct 43 ms 428 KB Output is correct
41 Correct 30 ms 436 KB Output is correct
42 Correct 26 ms 432 KB Output is correct
43 Correct 24 ms 456 KB Output is correct
44 Correct 26 ms 448 KB Output is correct
45 Correct 33 ms 428 KB Output is correct
46 Correct 40 ms 448 KB Output is correct
47 Correct 31 ms 444 KB Output is correct
48 Correct 29 ms 432 KB Output is correct
49 Correct 25 ms 448 KB Output is correct
50 Correct 37 ms 452 KB Output is correct
51 Correct 35 ms 444 KB Output is correct
52 Correct 27 ms 428 KB Output is correct
53 Correct 32 ms 452 KB Output is correct
54 Correct 30 ms 448 KB Output is correct
55 Correct 32 ms 452 KB Output is correct
56 Correct 28 ms 428 KB Output is correct
57 Correct 35 ms 596 KB Output is correct
58 Correct 28 ms 444 KB Output is correct
59 Correct 30 ms 444 KB Output is correct
60 Correct 39 ms 436 KB Output is correct