#include<bits/stdc++.h>
using namespace std;
#define all(a) a.begin(),a.end()
#define ll long long
#define pb push_back
#define nl '\n'
#define popb pop_back()
#define sz size()
#define ld long double
#define ull unsigned long long
#define F first
#define S second
#define fix fixed<<setprecision
#define pii pair<int,int>
#define E exit (0)
#define int long long
const int inf=1e9;
int c[100001],mn=inf,n;
void r(int pos,int k,int sum=0,int mx=0) {
if (pos==n+1&&k>0) {
return;
}
if (k==0&&pos==n+1) {
mn=min(mn,sum);
return;
}
if (k<0) {
return;
}
r(pos+1,k-1,sum+c[pos],c[pos]);
r(pos+1,k,sum-mx+max(mx,c[pos]),max(mx,c[pos]));
}
signed main() {
//freopen("planting.in","r",stdin);
//freopen("planting.out","w",stdout);
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int k;
cin>>n>>k;
for (int i=1;i<=n;i++) {
cin>>c[i];
}
r(1,k);
cout<<mn;
}
