답안 #298127

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
298127	2020-09-12T12:20:08 Z	eriksuenderhauf	Monochrome Points (JOI20_monochrome)	C++11	35 / 100	1953 ms	4400 KB

monochrome

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 2e5 + 5;
int a[2*N];
ll dp[N];

ll solve(int n, int i) {
  if (dp[i] != 0)
    return dp[i];
  int ptr[2] = {i+n, i+n}, cnt[4] = {0, 0, 0, 0};
  // auto next = [&](int& j) {
  //   j = j+1 < 2*n ? j+1 : j+1-2*n;
  // };
  #define next(x) x = x+1 < 2*n ? x+1 : x+1-2*n
  ll val = 0;
  for (int j = i, c = a[i]; j < i+n; c = a[++j]) {
    while (ptr[c] != i && a[ptr[c]] == c)
      cnt[c+2]++, next(ptr[c]);
    next(ptr[c]);
    val += min(cnt[c+2], cnt[c^1]) + cnt[c]++;
  }
  return dp[i] = val;
}

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int get(int l, int r) {
  return uniform_int_distribution<int>(l, r)(rng);
}

int main() {
  ios_base::sync_with_stdio(false); cin.tie(0);
  auto cur_t = clock();
  int n; cin >> n;
  string s; cin >> s;
  for (int i = 0; i < 2*n; i++)
    a[i] = s[i] == 'B';
  ll ans = 0;
  while (clock() - cur_t < 1950000) {
    ans = max(ans, solve(n, get(0, n-1)));
    // cerr << "HUH" << endl;
  }
  cout << ans << "\n";
}

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1951 ms	404 KB	Output is correct
2	Correct	1951 ms	396 KB	Output is correct
3	Correct	1951 ms	396 KB	Output is correct
4	Correct	1951 ms	400 KB	Output is correct
5	Correct	1951 ms	400 KB	Output is correct
6	Correct	1951 ms	404 KB	Output is correct
7	Correct	1951 ms	404 KB	Output is correct
8	Correct	1951 ms	504 KB	Output is correct
9	Correct	1951 ms	396 KB	Output is correct
10	Correct	1951 ms	504 KB	Output is correct
11	Correct	1951 ms	504 KB	Output is correct
12	Correct	1951 ms	404 KB	Output is correct
13	Correct	1951 ms	504 KB	Output is correct

Subtask #2
21.0 / 21.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1951 ms	404 KB	Output is correct
2	Correct	1951 ms	396 KB	Output is correct
3	Correct	1951 ms	396 KB	Output is correct
4	Correct	1951 ms	400 KB	Output is correct
5	Correct	1951 ms	400 KB	Output is correct
6	Correct	1951 ms	404 KB	Output is correct
7	Correct	1951 ms	404 KB	Output is correct
8	Correct	1951 ms	504 KB	Output is correct
9	Correct	1951 ms	396 KB	Output is correct
10	Correct	1951 ms	504 KB	Output is correct
11	Correct	1951 ms	504 KB	Output is correct
12	Correct	1951 ms	404 KB	Output is correct
13	Correct	1951 ms	504 KB	Output is correct
14	Correct	1951 ms	400 KB	Output is correct
15	Correct	1951 ms	384 KB	Output is correct
16	Correct	1951 ms	400 KB	Output is correct
17	Correct	1951 ms	404 KB	Output is correct
18	Correct	1951 ms	504 KB	Output is correct
19	Correct	1951 ms	400 KB	Output is correct
20	Correct	1951 ms	504 KB	Output is correct
21	Correct	1951 ms	504 KB	Output is correct
22	Correct	1951 ms	504 KB	Output is correct
23	Correct	1951 ms	404 KB	Output is correct
24	Correct	1951 ms	404 KB	Output is correct
25	Correct	1951 ms	412 KB	Output is correct
26	Correct	1951 ms	404 KB	Output is correct
27	Correct	1951 ms	504 KB	Output is correct
28	Correct	1951 ms	504 KB	Output is correct
29	Correct	1951 ms	504 KB	Output is correct
30	Correct	1951 ms	504 KB	Output is correct
31	Correct	1951 ms	504 KB	Output is correct
32	Correct	1951 ms	384 KB	Output is correct
33	Correct	1951 ms	504 KB	Output is correct

Subtask #3
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1951 ms	404 KB	Output is correct
2	Correct	1951 ms	396 KB	Output is correct
3	Correct	1951 ms	396 KB	Output is correct
4	Correct	1951 ms	400 KB	Output is correct
5	Correct	1951 ms	400 KB	Output is correct
6	Correct	1951 ms	404 KB	Output is correct
7	Correct	1951 ms	404 KB	Output is correct
8	Correct	1951 ms	504 KB	Output is correct
9	Correct	1951 ms	396 KB	Output is correct
10	Correct	1951 ms	504 KB	Output is correct
11	Correct	1951 ms	504 KB	Output is correct
12	Correct	1951 ms	404 KB	Output is correct
13	Correct	1951 ms	504 KB	Output is correct
14	Correct	1951 ms	400 KB	Output is correct
15	Correct	1951 ms	384 KB	Output is correct
16	Correct	1951 ms	400 KB	Output is correct
17	Correct	1951 ms	404 KB	Output is correct
18	Correct	1951 ms	504 KB	Output is correct
19	Correct	1951 ms	400 KB	Output is correct
20	Correct	1951 ms	504 KB	Output is correct
21	Correct	1951 ms	504 KB	Output is correct
22	Correct	1951 ms	504 KB	Output is correct
23	Correct	1951 ms	404 KB	Output is correct
24	Correct	1951 ms	404 KB	Output is correct
25	Correct	1951 ms	412 KB	Output is correct
26	Correct	1951 ms	404 KB	Output is correct
27	Correct	1951 ms	504 KB	Output is correct
28	Correct	1951 ms	504 KB	Output is correct
29	Correct	1951 ms	504 KB	Output is correct
30	Correct	1951 ms	504 KB	Output is correct
31	Correct	1951 ms	504 KB	Output is correct
32	Correct	1951 ms	384 KB	Output is correct
33	Correct	1951 ms	504 KB	Output is correct
34	Correct	1951 ms	440 KB	Output is correct
35	Correct	1951 ms	504 KB	Output is correct
36	Correct	1951 ms	440 KB	Output is correct
37	Correct	1951 ms	436 KB	Output is correct
38	Correct	1951 ms	436 KB	Output is correct
39	Correct	1951 ms	436 KB	Output is correct
40	Correct	1951 ms	504 KB	Output is correct
41	Correct	1951 ms	440 KB	Output is correct
42	Correct	1951 ms	436 KB	Output is correct
43	Correct	1951 ms	436 KB	Output is correct
44	Correct	1951 ms	436 KB	Output is correct
45	Correct	1951 ms	504 KB	Output is correct
46	Correct	1951 ms	432 KB	Output is correct
47	Correct	1951 ms	504 KB	Output is correct
48	Correct	1951 ms	504 KB	Output is correct
49	Correct	1951 ms	440 KB	Output is correct
50	Correct	1951 ms	432 KB	Output is correct
51	Correct	1951 ms	504 KB	Output is correct
52	Correct	1951 ms	504 KB	Output is correct

Subtask #4
0.0 / 65.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1951 ms	404 KB	Output is correct
2	Correct	1951 ms	396 KB	Output is correct
3	Correct	1951 ms	396 KB	Output is correct
4	Correct	1951 ms	400 KB	Output is correct
5	Correct	1951 ms	400 KB	Output is correct
6	Correct	1951 ms	404 KB	Output is correct
7	Correct	1951 ms	404 KB	Output is correct
8	Correct	1951 ms	504 KB	Output is correct
9	Correct	1951 ms	396 KB	Output is correct
10	Correct	1951 ms	504 KB	Output is correct
11	Correct	1951 ms	504 KB	Output is correct
12	Correct	1951 ms	404 KB	Output is correct
13	Correct	1951 ms	504 KB	Output is correct
14	Correct	1951 ms	400 KB	Output is correct
15	Correct	1951 ms	384 KB	Output is correct
16	Correct	1951 ms	400 KB	Output is correct
17	Correct	1951 ms	404 KB	Output is correct
18	Correct	1951 ms	504 KB	Output is correct
19	Correct	1951 ms	400 KB	Output is correct
20	Correct	1951 ms	504 KB	Output is correct
21	Correct	1951 ms	504 KB	Output is correct
22	Correct	1951 ms	504 KB	Output is correct
23	Correct	1951 ms	404 KB	Output is correct
24	Correct	1951 ms	404 KB	Output is correct
25	Correct	1951 ms	412 KB	Output is correct
26	Correct	1951 ms	404 KB	Output is correct
27	Correct	1951 ms	504 KB	Output is correct
28	Correct	1951 ms	504 KB	Output is correct
29	Correct	1951 ms	504 KB	Output is correct
30	Correct	1951 ms	504 KB	Output is correct
31	Correct	1951 ms	504 KB	Output is correct
32	Correct	1951 ms	384 KB	Output is correct
33	Correct	1951 ms	504 KB	Output is correct
34	Correct	1951 ms	440 KB	Output is correct
35	Correct	1951 ms	504 KB	Output is correct
36	Correct	1951 ms	440 KB	Output is correct
37	Correct	1951 ms	436 KB	Output is correct
38	Correct	1951 ms	436 KB	Output is correct
39	Correct	1951 ms	436 KB	Output is correct
40	Correct	1951 ms	504 KB	Output is correct
41	Correct	1951 ms	440 KB	Output is correct
42	Correct	1951 ms	436 KB	Output is correct
43	Correct	1951 ms	436 KB	Output is correct
44	Correct	1951 ms	436 KB	Output is correct
45	Correct	1951 ms	504 KB	Output is correct
46	Correct	1951 ms	432 KB	Output is correct
47	Correct	1951 ms	504 KB	Output is correct
48	Correct	1951 ms	504 KB	Output is correct
49	Correct	1951 ms	440 KB	Output is correct
50	Correct	1951 ms	432 KB	Output is correct
51	Correct	1951 ms	504 KB	Output is correct
52	Correct	1951 ms	504 KB	Output is correct
53	Correct	1951 ms	3596 KB	Output is correct
54	Correct	1953 ms	3864 KB	Output is correct
55	Correct	1952 ms	4004 KB	Output is correct
56	Correct	1953 ms	3688 KB	Output is correct
57	Correct	1951 ms	4108 KB	Output is correct
58	Correct	1952 ms	4112 KB	Output is correct
59	Correct	1951 ms	4236 KB	Output is correct
60	Correct	1953 ms	4236 KB	Output is correct
61	Correct	1953 ms	4400 KB	Output is correct
62	Incorrect	1953 ms	4364 KB	Output isn't correct
63	Halted	0 ms	0 KB	-

답안 #298127

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