#include <bits/stdc++.h>
#define Loop(x,l,r) for (ll x = (l); x < (ll)(r); ++x)
#define LoopR(x,l,r) for (ll x = (r)-1; x >= (ll)(l); --x)
typedef long long ll;
typedef std::pair<int, int> pii;
typedef std::pair<ll , ll > pll;
using namespace std;
const int N = 100'010;
const int K = 110;
const ll inf = 1e15;
ll dp[K][N];
ll a[N];
int n;
__attribute__((optimize("O3,unroll-loops"),target("avx2")))
ll get_max(int l, int r)
{
ll ans = 0;
Loop (i,l,r)
ans = a[i] > ans? a[i]: ans;
return ans;
}
void up_dp(int k, int l, int r, int pl, int pr)
{
if (r <= l)
return;
int mid = (l + r)/2;
ll mn = inf, mnp = -1;
ll mx = pr < mid? get_max(pr, mid): 0;
LoopR (i,pl,min(pr,mid)) {
mx = max(mx, a[i]);
if (mx + dp[k-1][i] < mn) {
mnp = i;
mn = mx + dp[k-1][i];
}
}
dp[k][mid] = mn;
up_dp(k, l, mid, pl, mnp+1);
up_dp(k, mid+1, r, mnp, pr);
}
int main()
{
cin.tie(0) -> sync_with_stdio(false);
int k;
cin >> n >> k;
Loop (i,0,n)
cin >> a[i];
dp[1][1] = a[0];
Loop (i,1,n)
dp[1][i+1] = max(dp[1][i], a[i]);
Loop (i,2,k+1)
up_dp(i, i, n+1, i-1, n);
cout << dp[k][n] << '\n';
}
