Submission #1101467

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101467		LOLOLO	K blocks (IZhO14_blocks)	C++14	53 / 100	1050 ms	85840 KiB

blocks

#include <bits/stdc++.h>
#define int long long
#define f first
#define pii pair<int, int>
#define s second
 
const int N = 1e5 + 5;
const int block = 450;
const int oo = 99999989;
const int base = 31;
 
using namespace std;
 
int n, a[N], dp[N][105], rmq[N][20], k;
 
int get(int l, int r){
	if(r == l) return rmq[l][0];
	int k = __lg(r - l + 1);
	return max(rmq[l][k], rmq[r - (1 << k) + 1][k]);
}
 
signed main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0);cout.tie(0);
 
	
	cin >> n >> k;
	for(int i = 1;i <= n;i++) cin >> a[i], rmq[i][0] = a[i];
	
	for(int j = 1;(1 << j) <= n;j++){
		for(int i = 1; i + (1 << j) - 1 <= n;i++){
			rmq[i][j] = max(rmq[i][j - 1], rmq[i + (1 << (j - 1))][j - 1]);
		}
	}
	
	memset(dp, 0x4f, sizeof(dp));
	dp[0][1] = 0;
	for(int i = 1;i <= n;i++) dp[i][1] = max(dp[i - 1][1], a[i]);
	
	
	for(int j = 2;j <= k;j++){
		for(int i = j;i <= n;i++){
		  
		  int tmp = (i - 20) * (n * k > 1e6);
			for(int h = max(j, tmp);h <= i;h++){
				dp[i][j] = min(dp[i][j], dp[h - 1][j - 1] + get(h,  i));
			}
		}
	}
	cout << dp[n][k];
	return 0;
}
 

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