#include <fstream>

using namespace std;

const char InFile[]="ferma.in";
const char OutFile[]="ferma.out";
const int MaxN=10111;
const int MaxK=1024;

ifstream fin(InFile);
ofstream fout(OutFile);

int V[MaxN],N,K,A[MaxN][MaxK],B[MaxN][MaxK];

int main()
{
	fin>>N>>K;
	for(register int i=1;i<=N;++i)
	{
		fin>>V[i];
	}
	fin.close();
	
	A[1][1]=V[1];
	for(register int i=2;i<=N;++i)
	{
		for(register int j=1;j<=K;++j)
		{
			A[i][j]=max(A[i-1][j]+V[i],B[i-1][j-1]+V[i]);
			B[i][j]=max(A[i-1][j],B[i-1][j]);
		}
	}
	int sol=max(A[N][K],B[N][K]);
	
	A[1][1]=V[1];
	for(register int i=2;i<=N;++i)
	{
		for(register int j=1;j<=K+1;++j)
		{
			A[i][j]=max(A[i-1][j]+V[i],B[i-1][j-1]+V[i]);
			B[i][j]=max(A[i-1][j],B[i-1][j]);
		}
	}
	//sol=max(sol,A[N][K+1]);
	sol=max(0,sol);
	
	fout<<sol;
	fout.close();
	return 0;
}