Submission #683891

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
683891	2023-01-19T14:48:30 Z	abc864197532	Monochrome Points (JOI20_monochrome)	C++17	35 / 100	2000 ms	2376 KB

monochrome

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define pii pair<int,int>
#define all(x) x.begin(), x.end()

int main() {
	ios::sync_with_stdio(false), cin.tie(0);
	int n;
	string s;
	cin >> n >> s;
	vector <pii> a;
	for (int i = 0; i < n; ++i) {
		if (s[i] == s[i + n]) {
			a.emplace_back(i, s[i] == 'B' ? 1 : 0);
		}
	}
	int m = a.size();
	ll ans = 1ll << 60;
	if (!m) {
		cout << 1ll * n * (n - 1) / 2 << '\n';
		return 0;
	}
	for (int rt = 0; rt < m; ++rt) {
		vector <pii> stk;
		ll cur = 0;
		for (int i = 0; i < m; ++i) {
			auto [x, id] = a[(i + rt) % m];
			if (!stk.empty() && stk.back().second != id) {
				int p = stk.back().first; stk.pop_back();
				int len = abs(p - x);
				cur += min(len, n - len);
			} else {
				stk.emplace_back(x, id);
			}
		}
		ans = min(ans, cur);
	}
	cout << 1ll * n * (n - 1) / 2 - ans << '\n';
}

Subtask #1
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	316 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	1 ms	316 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	1 ms	320 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	1 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	212 KB	Output is correct
11	Correct	0 ms	316 KB	Output is correct
12	Correct	1 ms	212 KB	Output is correct
13	Correct	1 ms	212 KB	Output is correct

Subtask #2
21.0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	316 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	1 ms	316 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	1 ms	320 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	1 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	212 KB	Output is correct
11	Correct	0 ms	316 KB	Output is correct
12	Correct	1 ms	212 KB	Output is correct
13	Correct	1 ms	212 KB	Output is correct
14	Correct	1 ms	212 KB	Output is correct
15	Correct	1 ms	212 KB	Output is correct
16	Correct	1 ms	212 KB	Output is correct
17	Correct	1 ms	212 KB	Output is correct
18	Correct	1 ms	212 KB	Output is correct
19	Correct	1 ms	320 KB	Output is correct
20	Correct	1 ms	256 KB	Output is correct
21	Correct	1 ms	212 KB	Output is correct
22	Correct	1 ms	212 KB	Output is correct
23	Correct	1 ms	212 KB	Output is correct
24	Correct	0 ms	212 KB	Output is correct
25	Correct	1 ms	212 KB	Output is correct
26	Correct	1 ms	212 KB	Output is correct
27	Correct	1 ms	212 KB	Output is correct
28	Correct	0 ms	212 KB	Output is correct
29	Correct	1 ms	320 KB	Output is correct
30	Correct	0 ms	212 KB	Output is correct
31	Correct	1 ms	212 KB	Output is correct
32	Correct	1 ms	324 KB	Output is correct
33	Correct	1 ms	212 KB	Output is correct

Subtask #3
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	316 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	1 ms	316 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	1 ms	320 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	1 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	212 KB	Output is correct
11	Correct	0 ms	316 KB	Output is correct
12	Correct	1 ms	212 KB	Output is correct
13	Correct	1 ms	212 KB	Output is correct
14	Correct	1 ms	212 KB	Output is correct
15	Correct	1 ms	212 KB	Output is correct
16	Correct	1 ms	212 KB	Output is correct
17	Correct	1 ms	212 KB	Output is correct
18	Correct	1 ms	212 KB	Output is correct
19	Correct	1 ms	320 KB	Output is correct
20	Correct	1 ms	256 KB	Output is correct
21	Correct	1 ms	212 KB	Output is correct
22	Correct	1 ms	212 KB	Output is correct
23	Correct	1 ms	212 KB	Output is correct
24	Correct	0 ms	212 KB	Output is correct
25	Correct	1 ms	212 KB	Output is correct
26	Correct	1 ms	212 KB	Output is correct
27	Correct	1 ms	212 KB	Output is correct
28	Correct	0 ms	212 KB	Output is correct
29	Correct	1 ms	320 KB	Output is correct
30	Correct	0 ms	212 KB	Output is correct
31	Correct	1 ms	212 KB	Output is correct
32	Correct	1 ms	324 KB	Output is correct
33	Correct	1 ms	212 KB	Output is correct
34	Correct	6 ms	356 KB	Output is correct
35	Correct	5 ms	340 KB	Output is correct
36	Correct	6 ms	340 KB	Output is correct
37	Correct	5 ms	340 KB	Output is correct
38	Correct	1 ms	212 KB	Output is correct
39	Correct	6 ms	340 KB	Output is correct
40	Correct	15 ms	340 KB	Output is correct
41	Correct	6 ms	340 KB	Output is correct
42	Correct	6 ms	340 KB	Output is correct
43	Correct	4 ms	340 KB	Output is correct
44	Correct	15 ms	356 KB	Output is correct
45	Correct	1 ms	212 KB	Output is correct
46	Correct	1 ms	212 KB	Output is correct
47	Correct	1 ms	212 KB	Output is correct
48	Correct	8 ms	348 KB	Output is correct
49	Correct	7 ms	340 KB	Output is correct
50	Correct	1 ms	212 KB	Output is correct
51	Correct	1 ms	212 KB	Output is correct
52	Correct	20 ms	360 KB	Output is correct

Subtask #4
0.0 / 65.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	316 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	1 ms	316 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	1 ms	320 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	1 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	212 KB	Output is correct
11	Correct	0 ms	316 KB	Output is correct
12	Correct	1 ms	212 KB	Output is correct
13	Correct	1 ms	212 KB	Output is correct
14	Correct	1 ms	212 KB	Output is correct
15	Correct	1 ms	212 KB	Output is correct
16	Correct	1 ms	212 KB	Output is correct
17	Correct	1 ms	212 KB	Output is correct
18	Correct	1 ms	212 KB	Output is correct
19	Correct	1 ms	320 KB	Output is correct
20	Correct	1 ms	256 KB	Output is correct
21	Correct	1 ms	212 KB	Output is correct
22	Correct	1 ms	212 KB	Output is correct
23	Correct	1 ms	212 KB	Output is correct
24	Correct	0 ms	212 KB	Output is correct
25	Correct	1 ms	212 KB	Output is correct
26	Correct	1 ms	212 KB	Output is correct
27	Correct	1 ms	212 KB	Output is correct
28	Correct	0 ms	212 KB	Output is correct
29	Correct	1 ms	320 KB	Output is correct
30	Correct	0 ms	212 KB	Output is correct
31	Correct	1 ms	212 KB	Output is correct
32	Correct	1 ms	324 KB	Output is correct
33	Correct	1 ms	212 KB	Output is correct
34	Correct	6 ms	356 KB	Output is correct
35	Correct	5 ms	340 KB	Output is correct
36	Correct	6 ms	340 KB	Output is correct
37	Correct	5 ms	340 KB	Output is correct
38	Correct	1 ms	212 KB	Output is correct
39	Correct	6 ms	340 KB	Output is correct
40	Correct	15 ms	340 KB	Output is correct
41	Correct	6 ms	340 KB	Output is correct
42	Correct	6 ms	340 KB	Output is correct
43	Correct	4 ms	340 KB	Output is correct
44	Correct	15 ms	356 KB	Output is correct
45	Correct	1 ms	212 KB	Output is correct
46	Correct	1 ms	212 KB	Output is correct
47	Correct	1 ms	212 KB	Output is correct
48	Correct	8 ms	348 KB	Output is correct
49	Correct	7 ms	340 KB	Output is correct
50	Correct	1 ms	212 KB	Output is correct
51	Correct	1 ms	212 KB	Output is correct
52	Correct	20 ms	360 KB	Output is correct
53	Execution timed out	2071 ms	2376 KB	Time limit exceeded
54	Halted	0 ms	0 KB	-

Submission #683891

Compilation message

Subtask #1 4.0 / 4.0

Subtask #2 21.0 / 21.0

Subtask #3 10.0 / 10.0

Subtask #4 0.0 / 65.0

Subtask #1
4.0 / 4.0

Subtask #2
21.0 / 21.0

Subtask #3
10.0 / 10.0

Subtask #4
0.0 / 65.0