답안 #299092

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
299092	2020-09-14T13:20:25 Z	eriksuenderhauf	Monochrome Points (JOI20_monochrome)	C++17	35 / 100	2000 ms	15380 KB

monochrome

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 2e5 + 5;
int a[4*N], nxt[3*N][2];
int idx[4*N][2], vis[2*N];
 
ll solve(int n, int i) {
  int ptr[2] = {i+n, i+n};
  int lo = idx[nxt[i+n][a[i]]][a[i]^1] - idx[nxt[i][a[i]^1]][a[i]];
  int hi = idx[nxt[i+n][a[i]^1]][a[i]] - idx[nxt[i][a[i]]][a[i]^1];
  if (vis[hi])
    return 0;
  vis[hi] = 1;
  ll val = 0;
  for (int j = i; j < i+n; ++j)
    val += min((ptr[a[j]] = nxt[ptr[a[j]]][a[j]] + 1) - n - i - 1, j - i);
  return val;
}

int main() {
  ios_base::sync_with_stdio(false); cin.tie(0);
  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';
  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;
  }
  idx[0][a[0]] = 1, idx[0][a[0]^1] = 0;
  for (int i = 1; i < 4*n; i++) {
    idx[i][0] = idx[i-1][0], idx[i][1] = idx[i-1][1];
    idx[i][a[i]]++;
  }
  ll ans = solve(n, 0);
  int idx = 0;
  for (int i = 0; i < n; i++) if (s[i] == s[i+n])
    ans = max(ans, solve(n, i));
  cout << ans << "\n";
}

Compilation message

monochrome.cpp: In function 'll solve(int, int)':
monochrome.cpp:10:7: warning: unused variable 'lo' [-Wunused-variable]
   10 |   int lo = idx[nxt[i+n][a[i]]][a[i]^1] - idx[nxt[i][a[i]^1]][a[i]];
      |       ^~
monochrome.cpp: In function 'int main()':
monochrome.cpp:38:7: warning: unused variable 'idx' [-Wunused-variable]
   38 |   int idx = 0;
      |       ^~~

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	384 KB	Output is correct
2	Correct	0 ms	384 KB	Output is correct
3	Correct	1 ms	416 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	1 ms	384 KB	Output is correct
6	Correct	0 ms	384 KB	Output is correct
7	Correct	0 ms	384 KB	Output is correct
8	Correct	1 ms	384 KB	Output is correct
9	Correct	0 ms	384 KB	Output is correct
10	Correct	1 ms	384 KB	Output is correct
11	Correct	1 ms	384 KB	Output is correct
12	Correct	1 ms	384 KB	Output is correct
13	Correct	0 ms	384 KB	Output is correct

Subtask #2
21.0 / 21.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	384 KB	Output is correct
2	Correct	0 ms	384 KB	Output is correct
3	Correct	1 ms	416 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	1 ms	384 KB	Output is correct
6	Correct	0 ms	384 KB	Output is correct
7	Correct	0 ms	384 KB	Output is correct
8	Correct	1 ms	384 KB	Output is correct
9	Correct	0 ms	384 KB	Output is correct
10	Correct	1 ms	384 KB	Output is correct
11	Correct	1 ms	384 KB	Output is correct
12	Correct	1 ms	384 KB	Output is correct
13	Correct	0 ms	384 KB	Output is correct
14	Correct	1 ms	384 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	1 ms	384 KB	Output is correct
17	Correct	1 ms	384 KB	Output is correct
18	Correct	1 ms	384 KB	Output is correct
19	Correct	1 ms	384 KB	Output is correct
20	Correct	1 ms	384 KB	Output is correct
21	Correct	1 ms	384 KB	Output is correct
22	Correct	1 ms	384 KB	Output is correct
23	Correct	1 ms	384 KB	Output is correct
24	Correct	1 ms	384 KB	Output is correct
25	Correct	1 ms	384 KB	Output is correct
26	Correct	1 ms	384 KB	Output is correct
27	Correct	1 ms	384 KB	Output is correct
28	Correct	1 ms	384 KB	Output is correct
29	Correct	1 ms	384 KB	Output is correct
30	Correct	1 ms	384 KB	Output is correct
31	Correct	1 ms	384 KB	Output is correct
32	Correct	1 ms	384 KB	Output is correct
33	Correct	1 ms	384 KB	Output is correct

Subtask #3
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	384 KB	Output is correct
2	Correct	0 ms	384 KB	Output is correct
3	Correct	1 ms	416 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	1 ms	384 KB	Output is correct
6	Correct	0 ms	384 KB	Output is correct
7	Correct	0 ms	384 KB	Output is correct
8	Correct	1 ms	384 KB	Output is correct
9	Correct	0 ms	384 KB	Output is correct
10	Correct	1 ms	384 KB	Output is correct
11	Correct	1 ms	384 KB	Output is correct
12	Correct	1 ms	384 KB	Output is correct
13	Correct	0 ms	384 KB	Output is correct
14	Correct	1 ms	384 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	1 ms	384 KB	Output is correct
17	Correct	1 ms	384 KB	Output is correct
18	Correct	1 ms	384 KB	Output is correct
19	Correct	1 ms	384 KB	Output is correct
20	Correct	1 ms	384 KB	Output is correct
21	Correct	1 ms	384 KB	Output is correct
22	Correct	1 ms	384 KB	Output is correct
23	Correct	1 ms	384 KB	Output is correct
24	Correct	1 ms	384 KB	Output is correct
25	Correct	1 ms	384 KB	Output is correct
26	Correct	1 ms	384 KB	Output is correct
27	Correct	1 ms	384 KB	Output is correct
28	Correct	1 ms	384 KB	Output is correct
29	Correct	1 ms	384 KB	Output is correct
30	Correct	1 ms	384 KB	Output is correct
31	Correct	1 ms	384 KB	Output is correct
32	Correct	1 ms	384 KB	Output is correct
33	Correct	1 ms	384 KB	Output is correct
34	Correct	1 ms	512 KB	Output is correct
35	Correct	1 ms	512 KB	Output is correct
36	Correct	2 ms	512 KB	Output is correct
37	Correct	2 ms	512 KB	Output is correct
38	Correct	1 ms	512 KB	Output is correct
39	Correct	9 ms	512 KB	Output is correct
40	Correct	1 ms	512 KB	Output is correct
41	Correct	2 ms	512 KB	Output is correct
42	Correct	1 ms	512 KB	Output is correct
43	Correct	7 ms	512 KB	Output is correct
44	Correct	1 ms	512 KB	Output is correct
45	Correct	1 ms	512 KB	Output is correct
46	Correct	1 ms	512 KB	Output is correct
47	Correct	1 ms	512 KB	Output is correct
48	Correct	12 ms	512 KB	Output is correct
49	Correct	8 ms	512 KB	Output is correct
50	Correct	1 ms	512 KB	Output is correct
51	Correct	1 ms	512 KB	Output is correct
52	Correct	1 ms	512 KB	Output is correct

Subtask #4
0.0 / 65.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	384 KB	Output is correct
2	Correct	0 ms	384 KB	Output is correct
3	Correct	1 ms	416 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	1 ms	384 KB	Output is correct
6	Correct	0 ms	384 KB	Output is correct
7	Correct	0 ms	384 KB	Output is correct
8	Correct	1 ms	384 KB	Output is correct
9	Correct	0 ms	384 KB	Output is correct
10	Correct	1 ms	384 KB	Output is correct
11	Correct	1 ms	384 KB	Output is correct
12	Correct	1 ms	384 KB	Output is correct
13	Correct	0 ms	384 KB	Output is correct
14	Correct	1 ms	384 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	1 ms	384 KB	Output is correct
17	Correct	1 ms	384 KB	Output is correct
18	Correct	1 ms	384 KB	Output is correct
19	Correct	1 ms	384 KB	Output is correct
20	Correct	1 ms	384 KB	Output is correct
21	Correct	1 ms	384 KB	Output is correct
22	Correct	1 ms	384 KB	Output is correct
23	Correct	1 ms	384 KB	Output is correct
24	Correct	1 ms	384 KB	Output is correct
25	Correct	1 ms	384 KB	Output is correct
26	Correct	1 ms	384 KB	Output is correct
27	Correct	1 ms	384 KB	Output is correct
28	Correct	1 ms	384 KB	Output is correct
29	Correct	1 ms	384 KB	Output is correct
30	Correct	1 ms	384 KB	Output is correct
31	Correct	1 ms	384 KB	Output is correct
32	Correct	1 ms	384 KB	Output is correct
33	Correct	1 ms	384 KB	Output is correct
34	Correct	1 ms	512 KB	Output is correct
35	Correct	1 ms	512 KB	Output is correct
36	Correct	2 ms	512 KB	Output is correct
37	Correct	2 ms	512 KB	Output is correct
38	Correct	1 ms	512 KB	Output is correct
39	Correct	9 ms	512 KB	Output is correct
40	Correct	1 ms	512 KB	Output is correct
41	Correct	2 ms	512 KB	Output is correct
42	Correct	1 ms	512 KB	Output is correct
43	Correct	7 ms	512 KB	Output is correct
44	Correct	1 ms	512 KB	Output is correct
45	Correct	1 ms	512 KB	Output is correct
46	Correct	1 ms	512 KB	Output is correct
47	Correct	1 ms	512 KB	Output is correct
48	Correct	12 ms	512 KB	Output is correct
49	Correct	8 ms	512 KB	Output is correct
50	Correct	1 ms	512 KB	Output is correct
51	Correct	1 ms	512 KB	Output is correct
52	Correct	1 ms	512 KB	Output is correct
53	Correct	578 ms	15372 KB	Output is correct
54	Correct	500 ms	15380 KB	Output is correct
55	Correct	705 ms	14612 KB	Output is correct
56	Correct	791 ms	14860 KB	Output is correct
57	Correct	25 ms	14996 KB	Output is correct
58	Execution timed out	2086 ms	15372 KB	Time limit exceeded
59	Halted	0 ms	0 KB	-

답안 #299092

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