#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); i++)
using ll = long long;
using vll = vector<ll>;
using vi = vector<int>;
using vvi = vector<vector<int>>;
using vvll = vector<vector<ll>>;
const int inf = 1e9;
const ll md = 1000000007;

int dp[3005][3005][2];
int w[3005];

int main() {
  int n,m;
  cin>>n>>m;
  rep(i,n) cin>>w[i];

  rep(i,n+1) rep(j,n+1) rep(k,2) dp[i][j][k]=-inf;
  dp[0][0][1]=0;
  rep(i,n) rep(j,min(i+1,m+1)) rep(k,2){
    int pre=dp[i][j][k];
    if (pre==-inf) continue;
    dp[i+1][j][0]=max(dp[i+1][j][0],pre);
    if (k) dp[i+1][j+1][1]=max(dp[i+1][j+1][1],pre+w[i]);
    else dp[i+1][j+1][1]=max(dp[i+1][j+1][1],pre);
  }
  int ans=dp[n][m][1];

  rep(i,n+1) rep(j,n+1) rep(k,2) dp[i][j][k]=-inf;
  dp[0][0][0]=0;
  rep(i,n) rep(j,min(i+1,m+1)) rep(k,2){
    int pre=dp[i][j][k];
    if (pre==-inf) continue;
    dp[i+1][j][0]=max(dp[i+1][j][0],pre);
    if (k) dp[i+1][j+1][1]=max(dp[i+1][j+1][1],pre+w[i]);
    else dp[i+1][j+1][1]=max(dp[i+1][j+1][1],pre);
  }
  ans=max(ans,dp[n][m][0]);
  cout<<ans<<endl;
  return 0;
}