#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl "\n"
#define pb push_back
#define ff first
#define ss second
#define ii pair<int, int>
#define vi vector<int>
#define vii vector<pair<int, int>>
#define yes cout << "YES\n"
#define no cout << "NO\n"
#define mii map<int, int>
#define rep(i, a, b) for (int i = a; i <= b; i++)
#define all(a, len) (a) + 1, (a) + len + 1
#define vall(a) (a).begin(), a.end()
const int INF = 4e18;
const int MOD = 1e9 + 7;
int n, k; const int mx = 1e5 + 3, mxk = 103;
int a[mx], dp[mxk][mx];
void TheEminemShow() {
cin >> n >> k;
rep(i, 1, n) cin >> a[i];
}
void Recovery() {
fill(&dp[0][0], &dp[0][0] + mxk * mx, INF);
dp[1][0] = 0;
for (int i = 1; i <= n; i++) dp[1][i] = max(dp[1][i-1], a[i]);
for (int i = 2; i <= k; i++) {
stack<ii> st;
for (int j = i; j <= n; j++) {
int mn_dp = dp[i-1][j-1];
while (st.size() && a[st.top().ss] <= a[j]) {
mn_dp = min(mn_dp, st.top().ff);
st.pop();
}
dp[i][j] = min(dp[i][st.empty() ? 0 : st.top().ss], mn_dp + a[j]);
st.push({mn_dp, j});
}
}
cout << dp[k][n];
}
void Kamikaze() {
}
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr); cout.tie(nullptr);
int TEST = 1;
// cin >> TEST;
while (TEST--) {
TheEminemShow();
Recovery();
Kamikaze();
}
return 0;
}
