#include<bits/stdc++.h>
using namespace std;
const int N=5e3+3;
const int inf=1e9+3;
#define ll long long
#define fi first
#define se second
#define pi pair
int a[N];
int dp[N][N];
int main(){
cin.tie(0)->sync_with_stdio(0);
int n,k;
cin>>n>>k;
for(int i=1;i<=n;i++){
cin>>a[i];
}
for(int i=0;i<k;i++){
dp[1][i]=1;
}
for(int i=1;i<=n;i++){
dp[i][k]=inf;
}
for(int i=2;i<=n;i++){
for(int j=0;j<k;j++){
dp[i][j]=min(dp[i-1][j+1]+1,dp[i-1][j]+a[i]-a[i-1]);
}
}
int ma=inf;
for(int i=0;i<=k;i++){
ma=min(ma,dp[n][i]);
}
cout<<ma;
}
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