Submission #882552

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
882552	2023-12-03T11:18:39 Z	MilosMilutinovic	Chorus (JOI23_chorus)	C++14	40 / 100	7000 ms	604 KB

chorus

#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, k;
  cin >> n >> k;
  string s;
  cin >> s;
  vector<int> a, b;
  for (int i = 0; i < 2 * n; i++) {
    if (s[i] == 'A') {
      a.push_back(i);
    } else {
      b.push_back(i);
    }
  }
  vector<int> ia(2 * n);
  for (int i = 0; i < n; i++) {
    ia[a[i]] = i + 1;
  }
  vector<int> pref(2 * n);
  for (int i = 0; i < 2 * n; i++) {
    if (i > 0) {
      pref[i] = pref[i - 1];
    }
    pref[i] += (s[i] == 'A' ? 1 : 0);
  }
  vector<int> ib(2 * n);
  for (int i = 0; i < n; i++) {
    ib[b[i]] = pref[b[i]];
  }
  auto Solve = [&](int L, int R) {
    int res = 0;
    for (int i = L; i <= R; i++) {
      res += max(0, ia[a[R]] - ib[b[i]]);
    }
    return res;
  };
  for (int i = 0; i < n; i++) {
    if (i > 0) {
      pref[i] = pref[i - 1];
    } else {
      pref[i] = 0;
    }
    pref[i] += ib[b[i]];
  }
  auto GetSum = [&](int L, int R) {
    return pref[R] - (L == 0 ? 0 : pref[L - 1]);
  };
  const int inf = (int) 1e9;
  vector<int> dp(n + 1, inf);
  dp[0] = 0;
  for (int foo = 0; foo < k; foo++) {
    vector<int> new_dp(n + 1, inf);
    int ptr = -1;
    for (int i = 0; i < n; i++) {
      while (ptr + 1 <= i && ia[a[i]] >= ib[b[ptr + 1]]) {
        ptr += 1;
      }
      for (int j = ptr + 1; j <= i; j++) {
        new_dp[i + 1] = min(new_dp[i + 1], dp[j]);
      }
      for (int j = 0; j <= ptr; j++) {
        new_dp[i + 1] = min(new_dp[i + 1], dp[j] + ia[a[i]] * (ptr - j + 1) - GetSum(j, ptr));
      }
    }
    swap(dp, new_dp);
  }
  cout << dp[n] << '\n';
  return 0;
}

Compilation message

chorus.cpp: In function 'int main()':
chorus.cpp:35:8: warning: variable 'Solve' set but not used [-Wunused-but-set-variable]
   35 |   auto Solve = [&](int L, int R) {
      |        ^~~~~

Subtask #1
16.0 / 16.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	600 KB	Output is correct
2	Correct	0 ms	344 KB	Output is correct
3	Correct	0 ms	604 KB	Output is correct
4	Correct	1 ms	604 KB	Output is correct
5	Correct	1 ms	448 KB	Output is correct
6	Correct	0 ms	600 KB	Output is correct
7	Correct	1 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct

Subtask #2
24.0 / 24.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	600 KB	Output is correct
2	Correct	0 ms	344 KB	Output is correct
3	Correct	0 ms	604 KB	Output is correct
4	Correct	1 ms	604 KB	Output is correct
5	Correct	1 ms	448 KB	Output is correct
6	Correct	0 ms	600 KB	Output is correct
7	Correct	1 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	3 ms	348 KB	Output is correct
18	Correct	17 ms	472 KB	Output is correct
19	Correct	50 ms	456 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	1 ms	348 KB	Output is correct
22	Correct	94 ms	456 KB	Output is correct
23	Correct	106 ms	452 KB	Output is correct
24	Correct	3 ms	480 KB	Output is correct
25	Correct	86 ms	460 KB	Output is correct
26	Correct	87 ms	348 KB	Output is correct
27	Correct	29 ms	344 KB	Output is correct
28	Correct	29 ms	456 KB	Output is correct

Subtask #3
0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	600 KB	Output is correct
2	Correct	0 ms	344 KB	Output is correct
3	Correct	0 ms	604 KB	Output is correct
4	Correct	1 ms	604 KB	Output is correct
5	Correct	1 ms	448 KB	Output is correct
6	Correct	0 ms	600 KB	Output is correct
7	Correct	1 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	3 ms	348 KB	Output is correct
18	Correct	17 ms	472 KB	Output is correct
19	Correct	50 ms	456 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	1 ms	348 KB	Output is correct
22	Correct	94 ms	456 KB	Output is correct
23	Correct	106 ms	452 KB	Output is correct
24	Correct	3 ms	480 KB	Output is correct
25	Correct	86 ms	460 KB	Output is correct
26	Correct	87 ms	348 KB	Output is correct
27	Correct	29 ms	344 KB	Output is correct
28	Correct	29 ms	456 KB	Output is correct
29	Execution timed out	7080 ms	600 KB	Time limit exceeded
30	Halted	0 ms	0 KB	-

Subtask #4
0 / 26.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	600 KB	Output is correct
2	Correct	0 ms	344 KB	Output is correct
3	Correct	0 ms	604 KB	Output is correct
4	Correct	1 ms	604 KB	Output is correct
5	Correct	1 ms	448 KB	Output is correct
6	Correct	0 ms	600 KB	Output is correct
7	Correct	1 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	3 ms	348 KB	Output is correct
18	Correct	17 ms	472 KB	Output is correct
19	Correct	50 ms	456 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	1 ms	348 KB	Output is correct
22	Correct	94 ms	456 KB	Output is correct
23	Correct	106 ms	452 KB	Output is correct
24	Correct	3 ms	480 KB	Output is correct
25	Correct	86 ms	460 KB	Output is correct
26	Correct	87 ms	348 KB	Output is correct
27	Correct	29 ms	344 KB	Output is correct
28	Correct	29 ms	456 KB	Output is correct
29	Execution timed out	7080 ms	600 KB	Time limit exceeded
30	Halted	0 ms	0 KB	-

Subtask #5
0 / 13.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	600 KB	Output is correct
2	Correct	0 ms	344 KB	Output is correct
3	Correct	0 ms	604 KB	Output is correct
4	Correct	1 ms	604 KB	Output is correct
5	Correct	1 ms	448 KB	Output is correct
6	Correct	0 ms	600 KB	Output is correct
7	Correct	1 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	3 ms	348 KB	Output is correct
18	Correct	17 ms	472 KB	Output is correct
19	Correct	50 ms	456 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	1 ms	348 KB	Output is correct
22	Correct	94 ms	456 KB	Output is correct
23	Correct	106 ms	452 KB	Output is correct
24	Correct	3 ms	480 KB	Output is correct
25	Correct	86 ms	460 KB	Output is correct
26	Correct	87 ms	348 KB	Output is correct
27	Correct	29 ms	344 KB	Output is correct
28	Correct	29 ms	456 KB	Output is correct
29	Execution timed out	7080 ms	600 KB	Time limit exceeded
30	Halted	0 ms	0 KB	-

Submission #882552

Compilation message

Subtask #1 16.0 / 16.0

Subtask #2 24.0 / 24.0

Subtask #3 0 / 21.0

Subtask #4 0 / 26.0

Subtask #5 0 / 13.0

Subtask #1
16.0 / 16.0

Subtask #2
24.0 / 24.0

Subtask #3
0 / 21.0

Subtask #4
0 / 26.0

Subtask #5
0 / 13.0