Submission #338307

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
338307	2020-12-22 22:46:49	Tosic	K blocks (IZhO14_blocks)	C++14	100 / 100	256 ms	45316 KiB

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#include <bits/stdc++.h>
#define maxn 100100
using namespace std;
 
int n, k;
int a[maxn], dp[maxn][110];
 
int main(){
  ios_base::sync_with_stdio(0);
  cout.tie(0);
  cin.tie(0);
  cin >> n >> k;
  for(int i = 1; i <= n; ++i){
    cin >> a[i];
  }
  dp[0][0] = 0;
  for(int i = 0; i < n; ++i){
    dp[i+1][1] = max(dp[i][1], a[i+1]);
  }
  for(int j = 2; j <= k; ++j){
    vector<pair<int, int> > dpStk;
    for(int i = j; i <= n; ++i){
      int tmpM = dp[i-1][j-1];
      while(!dpStk.empty() and dpStk.back().first <= a[i]){
        tmpM = min(tmpM, dpStk.back().second);
        dpStk.pop_back();
      }
      if(dpStk.empty() or dpStk.back().first+dpStk.back().second >= tmpM+a[i]){
        dpStk.push_back({a[i], tmpM});
        //cerr << tmpM << '\n';
 
 
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• Subtask 1: 14 / 14
• Subtask 2: 18 / 18
• Subtask 3: 21 / 21
• Subtask 4: 47 / 47