Submission #1162812

#	Time	Username	Problem	Language	Result	Execution time	Memory
1162812		lopkus	K blocks (IZhO14_blocks)	C++20	53 / 100	1096 ms	4936 KiB

blocks

#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, k;
  cin >> n >> k;
  vector<int> a(n + 1);
  for(int i = 1; i <= n; i++) {
    cin >> a[i];
  }
  vector<vector<int64_t>> dp(n + 1, vector<int64_t>(k + 1));
  for(int i = 0; i <= n; i++) {
    for(int j = 0; j <= k; j++) {
      dp[i][j] = 1e12;
    }
  }
  dp[0][0] = 0;
  /**
  for(int i = 1; i <= n; i++) {
    for(int j = 1; j <= min(k, i); j++) {
      int mx = a[i];
      for(int x = i - 1; x >= 0; x--) {
        dp[i][j] = min(dp[i][j], dp[x][j - 1] + mx);
        mx = max(mx, a[x]);
      }
    }
  }**/
  for(int c = 1; c <= k; c++) {
    for(int i = c; i <= n; i++) {
      int64_t mn = 1e9;
      for(int l = i; l >= c && a[i] >= a[l]; l--) {
        mn = min(mn, dp[l - 1][c - 1]);
      }
      for(int r = i; r <= n && a[i] >= a[r]; r++) {
        dp[r][c] = min(dp[r][c], mn + a[i]);
      }


      /**
      dp[i][j] <= dp[i + 1][j]
      **/
    }
  }
  cout << dp[n][k];
}

• Subtask 1: 14 / 14
• Subtask 2: 18 / 18
• Subtask 3: 21 / 21
• Subtask 4: 0 / 47