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#include <iostream> #include <vector> using namespace std; int n; int arr[100005]; int memo[100005]; int main() { int k; cin >> n >> k; for(int i = 0; i < n; i++) { cin >> arr[i]; memo[i] = 2e9; } memo[0] = 0; for(int i = 0; i < n; i++) { for(int j = 1; j <= k; j++) { if(i + j < n) { memo[i + j] = min(memo[i + j], memo[i] + abs(arr[i] - arr[i + j])); } } } cout << memo[n - 1] << endl; return 0; } // fib(7) = fib(6) + fib(5) //
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