Submission #388092

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
388092	2021-04-10 05:27:10	aarr	Split the sequence (APIO14_sequence)	C++14	49 / 100	156 ms	131076 KiB

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#include <bits/stdc++.h>
using namespace std;
 
const int N = 300 * 1000 + 5, K = 205;
const long long inf = 1e18 + N;
int n, k;
 
int a[N];
long long dp[N][K];
long long ps[N];
int par[N][K];
vector <int> vec;
 
long long get(int lv, int x, int y) {
  return 1ll * (ps[x] - ps[y]) * (ps[x] - ps[y]) + dp[y][lv - 1];
}
 
void solve(int lv, int l, int r, int s, int e) {
  if (r <= l) {
    return;
  }
  int md = (l + r) / 2;
  for (int i = s; i <= e; i++) {
    if (get(lv, md, i) < dp[md][lv]) {
      par[md][lv] = i;
      dp[md][lv] = get(lv, md, i);
    }
  }
  solve(lv, l, md, s, par[md][lv]);
  solve(lv, md + 1, r, par[md][lv], e);
 
 
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