#include<bits/stdc++.h>
using namespace std;
const int N=1e5+5;
int n, k, h[N], dp[N];
int main(){
cin>>n>>k;
for(int i=0;i<n;++i)
cin>>h[i];
cout<<"ha";
dp[0]=0;
for(int i=1;i<n;++i){
cout<<i<<'\n';
dp[i]=1e9+5;
if(i<k){
for(int j=0;j<i;++j)
dp[i]=min(dp[i], dp[j]+abs(h[i]-h[j]));
}
else{
for(int j=i-k;j<i;++i)
dp[i]=min(dp[i], dp[j]+abs(h[i]-h[j]));
}
//for(int j=max(0, i-k);j<i;++j)
// dp[i]=min(dp[i], dp[j]+abs(h[i]-h[j]));
}
cout<<dp[n-1]<<'\n';
}
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"sql","xml":"xml","apl":"apl","asterisk":"asterisk","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","d":"d","ecmascript":"javascript","erlang":"erlang","groovy":"text\/x-groovy","haskell":"text\/x-haskell","haxe":"text\/x-haxe","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mirc":"mirc","mysql":"sql","ocaml":"text\/x-ocaml","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"sql","properties":"text\/x-properties","q":"text\/x-q","scala":"scala","scheme":"text\/x-scheme","tcl":"text\/x-tcl","vb":"text\/x-vb","verilog":"text\/x-verilog","yaml":"text\/x-yaml","z80":"text\/x-z80"}