제출 #111007

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
111007		aleksami	수열 (APIO14_sequence)	C++14	0 / 100	27 ms	2048 KiB

sequence

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define MAXN 100005
#define MAXK 205
ll a[MAXN];
ll dp[MAXN][MAXK];
const ll INF = 1e18;

void divide(int idx,int l,int r,int optl,int optr)
{
	if(l>r)return ;
	int opt = -1;
	ll ans = -INF;
	int i = (l+r)/2;
	for(int j = optl; j <= optr; j++)
	{
		if(dp[idx-1][j]+a[j]*(a[i]-a[j])>ans)
		{
			ans=dp[idx-1][j]+a[j]*(a[i]-a[j]);
			opt=j;
		}
	}
	dp[idx][i]=ans;
	divide(idx,l,i-1,optl,opt);
	divide(idx,i+1,r,opt,optr);
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	int n,k;
	cin >> n >> k;
	for(int i = 1; i <= n; i++) cin >> a[i],a[i]+=a[i-1];
	for(int i = 1; i <= k; i++)
	{
		divide(i,1,n,1,n);
	}
	cout << dp[k][n];
	return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 11
• Subtask 3: 0 / 11
• Subtask 4: 0 / 17
• Subtask 5: 0 / 21
• Subtask 6: 0 / 29