Submission #891705

#	Time	Username	Problem	Language	Result	Execution time	Memory
891705		ind1v	Holding (COCI20_holding)	C++11	110 / 110	24 ms	25180 KiB

holding

#include <bits/stdc++.h>

using namespace std;

const int N = 105;
const int K = 2505;

int n, l, r, k;
int a[N];
int fl[N][N][K], fr[N][N][K];

template<typename T>
bool minimize(T &x, const T &y) {
  if (x > y) {
    x = y;
    return true;
  }
  return false;
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cin >> n >> l >> r >> k;
  k = min(k, K - 1);
  for (int i = 1; i <= n; i++) {
    cin >> a[i];
  }
  int cost = 0;
  for (int i = l; i <= r; i++) {
    cost += a[i];
  }
  for (int i = 1; i <= l - 1; i++) {
    for (int j = l; j <= r; j++) {
      for (int c = 0; c <= k; c++) {
        minimize(fl[i][j][c], fl[i - 1][j][c]);
        minimize(fl[i][j][c], fl[i][j - 1][c]);
        if (c >= 1) {
          minimize(fl[i][j][c], fl[i][j][c - 1]);
        }
        if (c >= j - i) {
          minimize(fl[i][j][c], fl[i - 1][j - 1][c - j + i] - a[j] + a[i]);
        }
      }
    }
  }
  for (int i = n; i >= r + 1; i--) {
    for (int j = r; j >= l; j--) {
      for (int c = 0; c <= k; c++) {
        minimize(fr[i][j][c], fr[i + 1][j][c]);
        minimize(fr[i][j][c], fr[i][j + 1][c]);
        if (c >= 1) {
          minimize(fr[i][j][c], fr[i][j][c - 1]);
        }
        if (c >= i - j) {
          minimize(fr[i][j][c], fr[i + 1][j + 1][c - i + j] - a[j] + a[i]);
        }
      }
    }
  }
  long long ans = cost;
  ans = min(ans, (long long) cost + fl[l - 1][r][k]);
  ans = min(ans, (long long) cost + fr[r + 1][l][k]);
  for (int i = l; i <= r - 1; i++) {
    for (int tk = 0; tk <= k; tk++) {
      ans = min(ans, (long long) cost + fl[l - 1][i][tk] + fr[r + 1][i + 1][k - tk]);
    }
  }
  cout << ans << '\n';
  return 0;
}

• Subtask 1: 22 / 22
• Subtask 2: 33 / 33
• Subtask 3: 33 / 33
• Subtask 4: 22 / 22