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- #include <iostream>
- #include <vector>
- using namespace std;
- const int maxn = 1e5 + 10;
- const int INF = 2e9 + 5;
- int main()
- {
- int n,k;
- cin>>n>>k;
- int array[n+1];
- for (int i=0;i<n;i++)
- {
- cin>>array[i];
- }
- int dp[n+1];
- for (int i=0;i<n+1;i++)
- {
- dp[i]=2e9;
- }
- int i=1;
- dp[0]=0;
- for (int a=0;a<n;a++)
- {
- for (int i=1;i<=k;i++)
- {
- if (a-i>=0)
- {
- dp[a]=min(dp[a], abs(array[a]-array[a-i]) + dp[a-i] );
- }
- }
- }
- cout<<dp[n-1]<<endl;
- return 0;
- }
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