Submission #683928

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
683928	2023-01-19T16:46:33 Z	abc864197532	Monochrome Points (JOI20_monochrome)	C++17	35 / 100	1901 ms	3424 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() {
	srand(time(NULL));
	ios::sync_with_stdio(false), cin.tie(0);
	double T = clock();
	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;
	}
	while ((clock() - T) / CLOCKS_PER_SEC <= 1.9) {
		int rt = rand() % m;
		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	1901 ms	300 KB	Output is correct
3	Correct	1901 ms	300 KB	Output is correct
4	Correct	1900 ms	300 KB	Output is correct
5	Correct	1900 ms	212 KB	Output is correct
6	Correct	1900 ms	296 KB	Output is correct
7	Correct	1900 ms	300 KB	Output is correct
8	Correct	1901 ms	300 KB	Output is correct
9	Correct	1900 ms	300 KB	Output is correct
10	Correct	1900 ms	300 KB	Output is correct
11	Correct	1 ms	212 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	1900 ms	300 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	1901 ms	300 KB	Output is correct
3	Correct	1901 ms	300 KB	Output is correct
4	Correct	1900 ms	300 KB	Output is correct
5	Correct	1900 ms	212 KB	Output is correct
6	Correct	1900 ms	296 KB	Output is correct
7	Correct	1900 ms	300 KB	Output is correct
8	Correct	1901 ms	300 KB	Output is correct
9	Correct	1900 ms	300 KB	Output is correct
10	Correct	1900 ms	300 KB	Output is correct
11	Correct	1 ms	212 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	1900 ms	300 KB	Output is correct
14	Correct	1900 ms	304 KB	Output is correct
15	Correct	1900 ms	308 KB	Output is correct
16	Correct	1900 ms	304 KB	Output is correct
17	Correct	1900 ms	304 KB	Output is correct
18	Correct	1900 ms	300 KB	Output is correct
19	Correct	1901 ms	308 KB	Output is correct
20	Correct	1901 ms	300 KB	Output is correct
21	Correct	1901 ms	304 KB	Output is correct
22	Correct	1900 ms	320 KB	Output is correct
23	Correct	1900 ms	304 KB	Output is correct
24	Correct	1900 ms	308 KB	Output is correct
25	Correct	1900 ms	304 KB	Output is correct
26	Correct	1900 ms	300 KB	Output is correct
27	Correct	1901 ms	296 KB	Output is correct
28	Correct	1901 ms	300 KB	Output is correct
29	Correct	1900 ms	300 KB	Output is correct
30	Correct	1900 ms	300 KB	Output is correct
31	Correct	1 ms	212 KB	Output is correct
32	Correct	1 ms	212 KB	Output is correct
33	Correct	1901 ms	304 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	1901 ms	300 KB	Output is correct
3	Correct	1901 ms	300 KB	Output is correct
4	Correct	1900 ms	300 KB	Output is correct
5	Correct	1900 ms	212 KB	Output is correct
6	Correct	1900 ms	296 KB	Output is correct
7	Correct	1900 ms	300 KB	Output is correct
8	Correct	1901 ms	300 KB	Output is correct
9	Correct	1900 ms	300 KB	Output is correct
10	Correct	1900 ms	300 KB	Output is correct
11	Correct	1 ms	212 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	1900 ms	300 KB	Output is correct
14	Correct	1900 ms	304 KB	Output is correct
15	Correct	1900 ms	308 KB	Output is correct
16	Correct	1900 ms	304 KB	Output is correct
17	Correct	1900 ms	304 KB	Output is correct
18	Correct	1900 ms	300 KB	Output is correct
19	Correct	1901 ms	308 KB	Output is correct
20	Correct	1901 ms	300 KB	Output is correct
21	Correct	1901 ms	304 KB	Output is correct
22	Correct	1900 ms	320 KB	Output is correct
23	Correct	1900 ms	304 KB	Output is correct
24	Correct	1900 ms	308 KB	Output is correct
25	Correct	1900 ms	304 KB	Output is correct
26	Correct	1900 ms	300 KB	Output is correct
27	Correct	1901 ms	296 KB	Output is correct
28	Correct	1901 ms	300 KB	Output is correct
29	Correct	1900 ms	300 KB	Output is correct
30	Correct	1900 ms	300 KB	Output is correct
31	Correct	1 ms	212 KB	Output is correct
32	Correct	1 ms	212 KB	Output is correct
33	Correct	1901 ms	304 KB	Output is correct
34	Correct	1900 ms	340 KB	Output is correct
35	Correct	1901 ms	332 KB	Output is correct
36	Correct	1901 ms	320 KB	Output is correct
37	Correct	1901 ms	340 KB	Output is correct
38	Correct	1900 ms	304 KB	Output is correct
39	Correct	1900 ms	340 KB	Output is correct
40	Correct	1900 ms	344 KB	Output is correct
41	Correct	1900 ms	320 KB	Output is correct
42	Correct	1901 ms	340 KB	Output is correct
43	Correct	1901 ms	340 KB	Output is correct
44	Correct	1900 ms	344 KB	Output is correct
45	Correct	1900 ms	312 KB	Output is correct
46	Correct	1900 ms	308 KB	Output is correct
47	Correct	1900 ms	320 KB	Output is correct
48	Correct	1900 ms	340 KB	Output is correct
49	Correct	1900 ms	460 KB	Output is correct
50	Correct	1 ms	212 KB	Output is correct
51	Correct	1 ms	212 KB	Output is correct
52	Correct	1901 ms	340 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	1901 ms	300 KB	Output is correct
3	Correct	1901 ms	300 KB	Output is correct
4	Correct	1900 ms	300 KB	Output is correct
5	Correct	1900 ms	212 KB	Output is correct
6	Correct	1900 ms	296 KB	Output is correct
7	Correct	1900 ms	300 KB	Output is correct
8	Correct	1901 ms	300 KB	Output is correct
9	Correct	1900 ms	300 KB	Output is correct
10	Correct	1900 ms	300 KB	Output is correct
11	Correct	1 ms	212 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	1900 ms	300 KB	Output is correct
14	Correct	1900 ms	304 KB	Output is correct
15	Correct	1900 ms	308 KB	Output is correct
16	Correct	1900 ms	304 KB	Output is correct
17	Correct	1900 ms	304 KB	Output is correct
18	Correct	1900 ms	300 KB	Output is correct
19	Correct	1901 ms	308 KB	Output is correct
20	Correct	1901 ms	300 KB	Output is correct
21	Correct	1901 ms	304 KB	Output is correct
22	Correct	1900 ms	320 KB	Output is correct
23	Correct	1900 ms	304 KB	Output is correct
24	Correct	1900 ms	308 KB	Output is correct
25	Correct	1900 ms	304 KB	Output is correct
26	Correct	1900 ms	300 KB	Output is correct
27	Correct	1901 ms	296 KB	Output is correct
28	Correct	1901 ms	300 KB	Output is correct
29	Correct	1900 ms	300 KB	Output is correct
30	Correct	1900 ms	300 KB	Output is correct
31	Correct	1 ms	212 KB	Output is correct
32	Correct	1 ms	212 KB	Output is correct
33	Correct	1901 ms	304 KB	Output is correct
34	Correct	1900 ms	340 KB	Output is correct
35	Correct	1901 ms	332 KB	Output is correct
36	Correct	1901 ms	320 KB	Output is correct
37	Correct	1901 ms	340 KB	Output is correct
38	Correct	1900 ms	304 KB	Output is correct
39	Correct	1900 ms	340 KB	Output is correct
40	Correct	1900 ms	344 KB	Output is correct
41	Correct	1900 ms	320 KB	Output is correct
42	Correct	1901 ms	340 KB	Output is correct
43	Correct	1901 ms	340 KB	Output is correct
44	Correct	1900 ms	344 KB	Output is correct
45	Correct	1900 ms	312 KB	Output is correct
46	Correct	1900 ms	308 KB	Output is correct
47	Correct	1900 ms	320 KB	Output is correct
48	Correct	1900 ms	340 KB	Output is correct
49	Correct	1900 ms	460 KB	Output is correct
50	Correct	1 ms	212 KB	Output is correct
51	Correct	1 ms	212 KB	Output is correct
52	Correct	1901 ms	340 KB	Output is correct
53	Correct	1901 ms	2404 KB	Output is correct
54	Correct	1901 ms	2404 KB	Output is correct
55	Correct	1901 ms	2276 KB	Output is correct
56	Correct	1901 ms	2276 KB	Output is correct
57	Correct	1900 ms	1248 KB	Output is correct
58	Incorrect	1901 ms	3424 KB	Output isn't correct
59	Halted	0 ms	0 KB	-

Submission #683928

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