#include <bits/stdc++.h>
#define int long long
using namespace std;
const int N = 1e5 + 42, K = 110, INF = 1e18 + 42;
int n, k, a[N], pre[N], dp[K][N];
signed main() {
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
cin >> n >> k;
n++;
a[0] = INF;
vector<int> imax(1);
for(int i = 1; i < n; i++) {
cin >> a[i];
while(a[imax.back()] < a[i])
imax.pop_back();
pre[i] = imax.back();
imax.push_back(i);
}
for(int i = 1; i < N; i++)
dp[0][i] = INF;
for(int i = 1; i <= k; i++) {
dp[i][i-1] = INF;
for(int j = i; j < n; j++) {
pre[j] = max(pre[j], i-1);
dp[i][j] = min(a[j] + dp[i-1][pre[j]], dp[i][pre[j]]);
}
}
cout << dp[k][n-1];
}
