Submission #375743

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
375743	2021-03-09T23:41:23 Z	rama_pang	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++14	100 / 100	33 ms	6656 KB

Main

#include <bits/stdc++.h>
using namespace std;
using lint = long long;

int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);

  int N;
  cin >> N;

  vector<lint> A(N);
  for (int i = 0; i < N; i++) {
    cin >> A[i];
  }

  vector<lint> B(N - 1);
  for (int i = 0; i < N - 1; i++) {
    B[i] = A[i + 1] - A[i];
  }

  // [l, r] += v -> B[l - 1] += v, B[r] -= v
  // exist k, B[0...k-1] >= 1, B[k...N-2] <= -1

  vector<lint> pref(N - 1);
  vector<lint> suff(N - 1);
  for (int i = 0; i < N - 1; i++) {
    pref[i] = (i > 0 ? pref[i - 1] : 0) + (B[i] <= 0 ? (-B[i] + 1) : 0);
  }
  for (int i = N - 2; i >= 0; i--) {
    suff[i] = (i < N - 2 ? suff[i + 1] : 0) + (B[i] >= 0 ? (B[i] + 1) : 0);
  }

  lint ans = LLONG_MAX;
  for (int i = 0; i < N; i++) {
    ans = min(ans, max(i > 0 ? pref[i - 1] : 0, i < N - 1 ? suff[i] : 0));
  }

  cout << ans << '\n';
  return 0;
}

Subtask #1

40.0 / 40.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	364 KB	Output is correct
15	Correct	1 ms	364 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	364 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct

Subtask #2

60.0 / 60.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	364 KB	Output is correct
15	Correct	1 ms	364 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	364 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct
25	Correct	1 ms	364 KB	Output is correct
26	Correct	28 ms	6636 KB	Output is correct
27	Correct	27 ms	6636 KB	Output is correct
28	Correct	27 ms	6636 KB	Output is correct
29	Correct	29 ms	6568 KB	Output is correct
30	Correct	31 ms	6636 KB	Output is correct
31	Correct	30 ms	6656 KB	Output is correct
32	Correct	33 ms	6636 KB	Output is correct
33	Correct	27 ms	6636 KB	Output is correct
34	Correct	26 ms	6636 KB	Output is correct
35	Correct	21 ms	6636 KB	Output is correct
36	Correct	22 ms	6636 KB	Output is correct
37	Correct	24 ms	6636 KB	Output is correct
38	Correct	27 ms	6636 KB	Output is correct
39	Correct	27 ms	6636 KB	Output is correct
40	Correct	32 ms	6636 KB	Output is correct
41	Correct	27 ms	6636 KB	Output is correct
42	Correct	25 ms	6636 KB	Output is correct
43	Correct	27 ms	6636 KB	Output is correct
44	Correct	26 ms	6636 KB	Output is correct
45	Correct	27 ms	6636 KB	Output is correct
46	Correct	27 ms	6636 KB	Output is correct
47	Correct	27 ms	6636 KB	Output is correct
48	Correct	30 ms	6636 KB	Output is correct