답안 #683931

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
683931 2023-01-19T16:49:35 Z abc864197532 Monochrome Points (JOI20_monochrome) C++17
35 / 100
1951 ms 3040 KB
#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;
	}
	if (m <= 5000) {
		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);
		}
	} else {
		while ((clock() - T) / CLOCKS_PER_SEC <= 1.95) {
			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';
}
# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 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 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 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 0 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 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 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 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 0 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 7 ms 340 KB Output is correct
35 Correct 6 ms 340 KB Output is correct
36 Correct 5 ms 340 KB Output is correct
37 Correct 6 ms 212 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 7 ms 212 KB Output is correct
40 Correct 15 ms 352 KB Output is correct
41 Correct 6 ms 340 KB Output is correct
42 Correct 6 ms 340 KB Output is correct
43 Correct 5 ms 340 KB Output is correct
44 Correct 16 ms 340 KB Output is correct
45 Correct 1 ms 212 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 1 ms 212 KB Output is correct
48 Correct 6 ms 212 KB Output is correct
49 Correct 6 ms 340 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 0 ms 212 KB Output is correct
52 Correct 20 ms 356 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 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 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 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 0 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 7 ms 340 KB Output is correct
35 Correct 6 ms 340 KB Output is correct
36 Correct 5 ms 340 KB Output is correct
37 Correct 6 ms 212 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 7 ms 212 KB Output is correct
40 Correct 15 ms 352 KB Output is correct
41 Correct 6 ms 340 KB Output is correct
42 Correct 6 ms 340 KB Output is correct
43 Correct 5 ms 340 KB Output is correct
44 Correct 16 ms 340 KB Output is correct
45 Correct 1 ms 212 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 1 ms 212 KB Output is correct
48 Correct 6 ms 212 KB Output is correct
49 Correct 6 ms 340 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 0 ms 212 KB Output is correct
52 Correct 20 ms 356 KB Output is correct
53 Correct 1951 ms 1892 KB Output is correct
54 Correct 1951 ms 1892 KB Output is correct
55 Correct 1951 ms 1952 KB Output is correct
56 Correct 1951 ms 1892 KB Output is correct
57 Correct 1 ms 864 KB Output is correct
58 Incorrect 1951 ms 3040 KB Output isn't correct
59 Halted 0 ms 0 KB -