#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define in insert
#define lb lower_bound
#define F first
#define S second
#define sz size()
#define int long long
#define all(v) v.begin(),v.end()
#define FOR1(x, n) for(int j = x; j <= n; j ++)
#define FOR(x, n, m, d) for(int x = n; x <= m; x += d)
#define FORR(x, n, m, d) for(int x = n; x >= m; x -= d)
#define nikita ios_base::sync_with_stdio(0), cin.tie(0);
const int N = 5e5+5;
int a[N], b[N], pref[N], d[N], c[N], ans, e[N], pref1[N];
int n,m,sum=0,x,y, r, cnt, l, mod = 998244353, inf = -1e18, k;
string s, str;
void solve(){
cin >> n >> m;
FOR(i,1,n,1)cin>>a[i];
ans = *max_element(a+1, a+n+1);
FOR(i,2,m,1){
sum = 0;
int res = 1e18;
FOR(j, 1, n, 1){
if(b[j]){
sum = 0;
continue;
}
sum = max(sum, a[j]);
if(sum < res)res = sum, y = j;
}
b[y] = 1;ans += res;
}
cout << ans;
}
signed main(){
nikita
int tt = 1;
if(!tt)cin >> tt;
FOR(i, 1, tt, 1){
solve();
}
}
