답안 #298166

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
298166	2020-09-12T13:04:20 Z	eriksuenderhauf	Monochrome Points (JOI20_monochrome)	C++17	35 / 100	1996 ms	10644 KB

monochrome

#pragma GCC optimize("O3")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC target("avx2")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 2e5 + 5;
int a[4*N], nxt[3*N][2];
ll dp[N];
int ord[2*N];
 
ll solve(int n, int i) {
  i = ord[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]) {
    cnt[c+2] += nxt[ptr[c]][c] - ptr[c];
    ptr[c] = nxt[ptr[c]][c] + 1;
    val += min(cnt[c+2], cnt[c^1]) + cnt[c]++;
  }
  return val;
}
 
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

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] = a[i+2*n] = s[i] == 'B', ord[i] = i;
  nxt[3*n][0] = nxt[3*n][1] = 3*n;
  for (int i = 3*n-1; i >= 0; i--) {
    nxt[i][0] = nxt[i+1][0], nxt[i][1] = nxt[i+1][1];
    nxt[i][a[i]^1] = i;
  }
  shuffle(ord, ord+n, rng);
  ll ans = 0;
  int i = 0;
  while (clock() - cur_t < 1993000)
    ans = max(ans, i < n ? solve(n, i++) : 0);
  cout << ans << "\n";
}

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1994 ms	384 KB	Output is correct
2	Correct	1994 ms	504 KB	Output is correct
3	Correct	1994 ms	408 KB	Output is correct
4	Correct	1994 ms	504 KB	Output is correct
5	Correct	1994 ms	504 KB	Output is correct
6	Correct	1994 ms	384 KB	Output is correct
7	Correct	1994 ms	408 KB	Output is correct
8	Correct	1994 ms	404 KB	Output is correct
9	Correct	1994 ms	504 KB	Output is correct
10	Correct	1994 ms	512 KB	Output is correct
11	Correct	1994 ms	408 KB	Output is correct
12	Correct	1994 ms	408 KB	Output is correct
13	Correct	1994 ms	412 KB	Output is correct

Subtask #2
21.0 / 21.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1994 ms	384 KB	Output is correct
2	Correct	1994 ms	504 KB	Output is correct
3	Correct	1994 ms	408 KB	Output is correct
4	Correct	1994 ms	504 KB	Output is correct
5	Correct	1994 ms	504 KB	Output is correct
6	Correct	1994 ms	384 KB	Output is correct
7	Correct	1994 ms	408 KB	Output is correct
8	Correct	1994 ms	404 KB	Output is correct
9	Correct	1994 ms	504 KB	Output is correct
10	Correct	1994 ms	512 KB	Output is correct
11	Correct	1994 ms	408 KB	Output is correct
12	Correct	1994 ms	408 KB	Output is correct
13	Correct	1994 ms	412 KB	Output is correct
14	Correct	1994 ms	420 KB	Output is correct
15	Correct	1994 ms	504 KB	Output is correct
16	Correct	1994 ms	416 KB	Output is correct
17	Correct	1994 ms	424 KB	Output is correct
18	Correct	1994 ms	420 KB	Output is correct
19	Correct	1994 ms	416 KB	Output is correct
20	Correct	1994 ms	384 KB	Output is correct
21	Correct	1994 ms	384 KB	Output is correct
22	Correct	1994 ms	384 KB	Output is correct
23	Correct	1994 ms	504 KB	Output is correct
24	Correct	1994 ms	416 KB	Output is correct
25	Correct	1994 ms	420 KB	Output is correct
26	Correct	1994 ms	420 KB	Output is correct
27	Correct	1994 ms	504 KB	Output is correct
28	Correct	1994 ms	416 KB	Output is correct
29	Correct	1994 ms	536 KB	Output is correct
30	Correct	1994 ms	420 KB	Output is correct
31	Correct	1994 ms	504 KB	Output is correct
32	Correct	1994 ms	504 KB	Output is correct
33	Correct	1994 ms	420 KB	Output is correct

Subtask #3
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1994 ms	384 KB	Output is correct
2	Correct	1994 ms	504 KB	Output is correct
3	Correct	1994 ms	408 KB	Output is correct
4	Correct	1994 ms	504 KB	Output is correct
5	Correct	1994 ms	504 KB	Output is correct
6	Correct	1994 ms	384 KB	Output is correct
7	Correct	1994 ms	408 KB	Output is correct
8	Correct	1994 ms	404 KB	Output is correct
9	Correct	1994 ms	504 KB	Output is correct
10	Correct	1994 ms	512 KB	Output is correct
11	Correct	1994 ms	408 KB	Output is correct
12	Correct	1994 ms	408 KB	Output is correct
13	Correct	1994 ms	412 KB	Output is correct
14	Correct	1994 ms	420 KB	Output is correct
15	Correct	1994 ms	504 KB	Output is correct
16	Correct	1994 ms	416 KB	Output is correct
17	Correct	1994 ms	424 KB	Output is correct
18	Correct	1994 ms	420 KB	Output is correct
19	Correct	1994 ms	416 KB	Output is correct
20	Correct	1994 ms	384 KB	Output is correct
21	Correct	1994 ms	384 KB	Output is correct
22	Correct	1994 ms	384 KB	Output is correct
23	Correct	1994 ms	504 KB	Output is correct
24	Correct	1994 ms	416 KB	Output is correct
25	Correct	1994 ms	420 KB	Output is correct
26	Correct	1994 ms	420 KB	Output is correct
27	Correct	1994 ms	504 KB	Output is correct
28	Correct	1994 ms	416 KB	Output is correct
29	Correct	1994 ms	536 KB	Output is correct
30	Correct	1994 ms	420 KB	Output is correct
31	Correct	1994 ms	504 KB	Output is correct
32	Correct	1994 ms	504 KB	Output is correct
33	Correct	1994 ms	420 KB	Output is correct
34	Correct	1994 ms	504 KB	Output is correct
35	Correct	1994 ms	504 KB	Output is correct
36	Correct	1994 ms	508 KB	Output is correct
37	Correct	1994 ms	500 KB	Output is correct
38	Correct	1994 ms	496 KB	Output is correct
39	Correct	1994 ms	532 KB	Output is correct
40	Correct	1994 ms	504 KB	Output is correct
41	Correct	1994 ms	504 KB	Output is correct
42	Correct	1994 ms	504 KB	Output is correct
43	Correct	1994 ms	504 KB	Output is correct
44	Correct	1994 ms	504 KB	Output is correct
45	Correct	1994 ms	504 KB	Output is correct
46	Correct	1994 ms	500 KB	Output is correct
47	Correct	1994 ms	512 KB	Output is correct
48	Correct	1994 ms	632 KB	Output is correct
49	Correct	1994 ms	496 KB	Output is correct
50	Correct	1994 ms	504 KB	Output is correct
51	Correct	1994 ms	504 KB	Output is correct
52	Correct	1994 ms	512 KB	Output is correct

Subtask #4
0.0 / 65.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1994 ms	384 KB	Output is correct
2	Correct	1994 ms	504 KB	Output is correct
3	Correct	1994 ms	408 KB	Output is correct
4	Correct	1994 ms	504 KB	Output is correct
5	Correct	1994 ms	504 KB	Output is correct
6	Correct	1994 ms	384 KB	Output is correct
7	Correct	1994 ms	408 KB	Output is correct
8	Correct	1994 ms	404 KB	Output is correct
9	Correct	1994 ms	504 KB	Output is correct
10	Correct	1994 ms	512 KB	Output is correct
11	Correct	1994 ms	408 KB	Output is correct
12	Correct	1994 ms	408 KB	Output is correct
13	Correct	1994 ms	412 KB	Output is correct
14	Correct	1994 ms	420 KB	Output is correct
15	Correct	1994 ms	504 KB	Output is correct
16	Correct	1994 ms	416 KB	Output is correct
17	Correct	1994 ms	424 KB	Output is correct
18	Correct	1994 ms	420 KB	Output is correct
19	Correct	1994 ms	416 KB	Output is correct
20	Correct	1994 ms	384 KB	Output is correct
21	Correct	1994 ms	384 KB	Output is correct
22	Correct	1994 ms	384 KB	Output is correct
23	Correct	1994 ms	504 KB	Output is correct
24	Correct	1994 ms	416 KB	Output is correct
25	Correct	1994 ms	420 KB	Output is correct
26	Correct	1994 ms	420 KB	Output is correct
27	Correct	1994 ms	504 KB	Output is correct
28	Correct	1994 ms	416 KB	Output is correct
29	Correct	1994 ms	536 KB	Output is correct
30	Correct	1994 ms	420 KB	Output is correct
31	Correct	1994 ms	504 KB	Output is correct
32	Correct	1994 ms	504 KB	Output is correct
33	Correct	1994 ms	420 KB	Output is correct
34	Correct	1994 ms	504 KB	Output is correct
35	Correct	1994 ms	504 KB	Output is correct
36	Correct	1994 ms	508 KB	Output is correct
37	Correct	1994 ms	500 KB	Output is correct
38	Correct	1994 ms	496 KB	Output is correct
39	Correct	1994 ms	532 KB	Output is correct
40	Correct	1994 ms	504 KB	Output is correct
41	Correct	1994 ms	504 KB	Output is correct
42	Correct	1994 ms	504 KB	Output is correct
43	Correct	1994 ms	504 KB	Output is correct
44	Correct	1994 ms	504 KB	Output is correct
45	Correct	1994 ms	504 KB	Output is correct
46	Correct	1994 ms	500 KB	Output is correct
47	Correct	1994 ms	512 KB	Output is correct
48	Correct	1994 ms	632 KB	Output is correct
49	Correct	1994 ms	496 KB	Output is correct
50	Correct	1994 ms	504 KB	Output is correct
51	Correct	1994 ms	504 KB	Output is correct
52	Correct	1994 ms	512 KB	Output is correct
53	Correct	1995 ms	10260 KB	Output is correct
54	Correct	1995 ms	10644 KB	Output is correct
55	Correct	1996 ms	10132 KB	Output is correct
56	Correct	1995 ms	10260 KB	Output is correct
57	Correct	1995 ms	10388 KB	Output is correct
58	Incorrect	1996 ms	10644 KB	Output isn't correct
59	Halted	0 ms	0 KB	-

답안 #298166

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