oj.uz

Submission #298131

# Submission time Handle Problem Language Result Execution time Memory
298131 2020-09-12T12:24:16 Z eriksuenderhauf Monochrome Points (JOI20_monochrome) C++17
35 / 100
 1992 ms 3912 KB 
#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 < 1990000) {
    ans = max(ans, solve(n, get(0, n-1)));
    // cerr << "HUH" << endl;
  }
  cout << ans << "\n";
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1991 ms 400 KB Output is correct
2 Correct 1991 ms 504 KB Output is correct
3 Correct 1991 ms 400 KB Output is correct
4 Correct 1991 ms 504 KB Output is correct
5 Correct 1991 ms 404 KB Output is correct
6 Correct 1991 ms 396 KB Output is correct
7 Correct 1991 ms 400 KB Output is correct
8 Correct 1991 ms 504 KB Output is correct
9 Correct 1991 ms 384 KB Output is correct
10 Correct 1991 ms 400 KB Output is correct
11 Correct 1991 ms 504 KB Output is correct
12 Correct 1991 ms 400 KB Output is correct
13 Correct 1991 ms 396 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1991 ms 400 KB Output is correct
2 Correct 1991 ms 504 KB Output is correct
3 Correct 1991 ms 400 KB Output is correct
4 Correct 1991 ms 504 KB Output is correct
5 Correct 1991 ms 404 KB Output is correct
6 Correct 1991 ms 396 KB Output is correct
7 Correct 1991 ms 400 KB Output is correct
8 Correct 1991 ms 504 KB Output is correct
9 Correct 1991 ms 384 KB Output is correct
10 Correct 1991 ms 400 KB Output is correct
11 Correct 1991 ms 504 KB Output is correct
12 Correct 1991 ms 400 KB Output is correct
13 Correct 1991 ms 396 KB Output is correct
14 Correct 1991 ms 504 KB Output is correct
15 Correct 1991 ms 504 KB Output is correct
16 Correct 1991 ms 400 KB Output is correct
17 Correct 1991 ms 404 KB Output is correct
18 Correct 1991 ms 408 KB Output is correct
19 Correct 1991 ms 404 KB Output is correct
20 Correct 1991 ms 404 KB Output is correct
21 Correct 1991 ms 504 KB Output is correct
22 Correct 1991 ms 384 KB Output is correct
23 Correct 1991 ms 528 KB Output is correct
24 Correct 1991 ms 504 KB Output is correct
25 Correct 1991 ms 504 KB Output is correct
26 Correct 1991 ms 504 KB Output is correct
27 Correct 1991 ms 504 KB Output is correct
28 Correct 1991 ms 504 KB Output is correct
29 Correct 1991 ms 400 KB Output is correct
30 Correct 1991 ms 508 KB Output is correct
31 Correct 1991 ms 504 KB Output is correct
32 Correct 1991 ms 504 KB Output is correct
33 Correct 1991 ms 504 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1991 ms 400 KB Output is correct
2 Correct 1991 ms 504 KB Output is correct
3 Correct 1991 ms 400 KB Output is correct
4 Correct 1991 ms 504 KB Output is correct
5 Correct 1991 ms 404 KB Output is correct
6 Correct 1991 ms 396 KB Output is correct
7 Correct 1991 ms 400 KB Output is correct
8 Correct 1991 ms 504 KB Output is correct
9 Correct 1991 ms 384 KB Output is correct
10 Correct 1991 ms 400 KB Output is correct
11 Correct 1991 ms 504 KB Output is correct
12 Correct 1991 ms 400 KB Output is correct
13 Correct 1991 ms 396 KB Output is correct
14 Correct 1991 ms 504 KB Output is correct
15 Correct 1991 ms 504 KB Output is correct
16 Correct 1991 ms 400 KB Output is correct
17 Correct 1991 ms 404 KB Output is correct
18 Correct 1991 ms 408 KB Output is correct
19 Correct 1991 ms 404 KB Output is correct
20 Correct 1991 ms 404 KB Output is correct
21 Correct 1991 ms 504 KB Output is correct
22 Correct 1991 ms 384 KB Output is correct
23 Correct 1991 ms 528 KB Output is correct
24 Correct 1991 ms 504 KB Output is correct
25 Correct 1991 ms 504 KB Output is correct
26 Correct 1991 ms 504 KB Output is correct
27 Correct 1991 ms 504 KB Output is correct
28 Correct 1991 ms 504 KB Output is correct
29 Correct 1991 ms 400 KB Output is correct
30 Correct 1991 ms 508 KB Output is correct
31 Correct 1991 ms 504 KB Output is correct
32 Correct 1991 ms 504 KB Output is correct
33 Correct 1991 ms 504 KB Output is correct
34 Correct 1991 ms 504 KB Output is correct
35 Correct 1991 ms 504 KB Output is correct
36 Correct 1991 ms 440 KB Output is correct
37 Correct 1991 ms 504 KB Output is correct
38 Correct 1991 ms 504 KB Output is correct
39 Correct 1991 ms 504 KB Output is correct
40 Correct 1991 ms 564 KB Output is correct
41 Correct 1991 ms 504 KB Output is correct
42 Correct 1991 ms 436 KB Output is correct
43 Correct 1991 ms 444 KB Output is correct
44 Correct 1991 ms 436 KB Output is correct
45 Correct 1991 ms 504 KB Output is correct
46 Correct 1991 ms 384 KB Output is correct
47 Correct 1991 ms 384 KB Output is correct
48 Correct 1991 ms 504 KB Output is correct
49 Correct 1991 ms 432 KB Output is correct
50 Correct 1991 ms 504 KB Output is correct
51 Correct 1991 ms 504 KB Output is correct
52 Correct 1991 ms 504 KB Output is correct

Subtask #4
0.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 1991 ms 400 KB Output is correct
2 Correct 1991 ms 504 KB Output is correct
3 Correct 1991 ms 400 KB Output is correct
4 Correct 1991 ms 504 KB Output is correct
5 Correct 1991 ms 404 KB Output is correct
6 Correct 1991 ms 396 KB Output is correct
7 Correct 1991 ms 400 KB Output is correct
8 Correct 1991 ms 504 KB Output is correct
9 Correct 1991 ms 384 KB Output is correct
10 Correct 1991 ms 400 KB Output is correct
11 Correct 1991 ms 504 KB Output is correct
12 Correct 1991 ms 400 KB Output is correct
13 Correct 1991 ms 396 KB Output is correct
14 Correct 1991 ms 504 KB Output is correct
15 Correct 1991 ms 504 KB Output is correct
16 Correct 1991 ms 400 KB Output is correct
17 Correct 1991 ms 404 KB Output is correct
18 Correct 1991 ms 408 KB Output is correct
19 Correct 1991 ms 404 KB Output is correct
20 Correct 1991 ms 404 KB Output is correct
21 Correct 1991 ms 504 KB Output is correct
22 Correct 1991 ms 384 KB Output is correct
23 Correct 1991 ms 528 KB Output is correct
24 Correct 1991 ms 504 KB Output is correct
25 Correct 1991 ms 504 KB Output is correct
26 Correct 1991 ms 504 KB Output is correct
27 Correct 1991 ms 504 KB Output is correct
28 Correct 1991 ms 504 KB Output is correct
29 Correct 1991 ms 400 KB Output is correct
30 Correct 1991 ms 508 KB Output is correct
31 Correct 1991 ms 504 KB Output is correct
32 Correct 1991 ms 504 KB Output is correct
33 Correct 1991 ms 504 KB Output is correct
34 Correct 1991 ms 504 KB Output is correct
35 Correct 1991 ms 504 KB Output is correct
36 Correct 1991 ms 440 KB Output is correct
37 Correct 1991 ms 504 KB Output is correct
38 Correct 1991 ms 504 KB Output is correct
39 Correct 1991 ms 504 KB Output is correct
40 Correct 1991 ms 564 KB Output is correct
41 Correct 1991 ms 504 KB Output is correct
42 Correct 1991 ms 436 KB Output is correct
43 Correct 1991 ms 444 KB Output is correct
44 Correct 1991 ms 436 KB Output is correct
45 Correct 1991 ms 504 KB Output is correct
46 Correct 1991 ms 384 KB Output is correct
47 Correct 1991 ms 384 KB Output is correct
48 Correct 1991 ms 504 KB Output is correct
49 Correct 1991 ms 432 KB Output is correct
50 Correct 1991 ms 504 KB Output is correct
51 Correct 1991 ms 504 KB Output is correct
52 Correct 1991 ms 504 KB Output is correct
53 Incorrect 1992 ms 3912 KB Output isn't correct
54 Halted 0 ms 0 KB -