Submission #99881

#	Time	Username	Problem	Language	Result	Execution time	Memory
99881		WLZ	Split the sequence (APIO14_sequence)	C++17	50 / 100	2039 ms	24696 KiB

sequence

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

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, k;
  cin >> n >> k;
  vector<long long> a(n + 1);
  vector<long long> pre(n + 1, 0);
  for (int i = 1; i <= n; i++) {
    cin >> a[i];
    pre[i] = pre[i - 1] + a[i];
  }
  vector< vector<long long> > dp(n + 1, vector<long long>(k + 1, 0));
  vector< vector<int> > from(n + 1, vector<int>(k + 1, -1));
  for (int i = 1; i <= n; i++) {
    for (int t = 1; t <= k; t++) {
      for (int j = 1; j < i; j++) {
        if (dp[j][t - 1] + (pre[i] - pre[j]) * pre[j] >= dp[i][t]) {
          dp[i][t] = dp[j][t - 1] + (pre[i] - pre[j]) * pre[j];
          from[i][t] = j;
        }
      }
    }
  }
  cout << dp[n][k] << '\n';
  int cur = from[n][k], cnt = 1;
  vector<int> v;
  while (cur != -1) {
    v.push_back(cur);
    cur = from[cur][k - cnt++];
  }
  reverse(v.begin(), v.end());
  for (auto& x : v) {
    cout << x << ' ';
  }
  cout << '\n';
  return 0;
}

• Subtask 1: 11 / 11
• Subtask 2: 11 / 11
• Subtask 3: 11 / 11
• Subtask 4: 17 / 17
• Subtask 5: 0 / 21
• Subtask 6: 0 / 29