#include "bits/stdc++.h"
#define sz(x) (int)size(x)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
using namespace std;
using ll = long long;
using pii = pair<int, int>;
const char nl = '\n';
const int INF = 0x3f3f3f3f;
const ll LINF = 0x3f3f3f3f3f3f3f3f;
int32_t main() {
ios::sync_with_stdio(0), cin.tie(0);
int n, k; cin >> n >> k;
vector<int> a(n + 1);
for (int i = 1; i <= n; i++)
cin >> a[i];
vector dp(n + 1, vector<ll>(k + 1, LINF));
dp[0][0] = 0;
for (int i = 1; i <= n; i++)
for (int j = 1; j <= k; j++)
dp[i][j] = min(dp[i - 1][j - 1] + 1, dp[i - 1][j] + a[i] - a[i - 1]);
cout << dp[n][k] << nl;
return 0;
}
