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  1. #include <iostream>
  2. #include <vector>
  3. #include <cstring>
  4. using namespace std;
  5.  
  6. const int MAX_N = 1e5;
  7.  
  8. int n, k;
  9. int h[MAX_N];
  10. int memo[MAX_N];
  11.  
  12. int dp(int i) {
  13.     if (i == 0) {
  14.         return 0;
  15.     }
  16.  
  17.     if (memo[i] != -1) {
  18.         return memo[i];
  19.     }
  20.  
  21.     int result = 1e9;
  22.     for (int j = 1; j <= k; ++j) {
  23.     	if (i - j >= 0) {
  24.     		result = min(result, dp(i - j) + abs(h[i] - h[i - j]));
  25.     	}
  26.     }
  27.  
  28.     memo[i] = result;
  29.     return memo[i];
  30. }
  31.  
  32. int main() {
  33.     cin >> n >> k;
  34.  
  35.     memset(memo, -1, sizeof(memo));
  36.  
  37.     for (int i = 0; i < n; ++i) {
  38.         cin >> h[i];
  39.     }
  40.  
  41.     cout << dp(n - 1);
  42.  
  43.     return 0;
  44. }
Success #stdin #stdout 0s 5284KB
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stdin
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10 4
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stdout
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40
https://ideone.com/LsJOpI
language:
C++14 (gcc 8.3)
created:
26 days ago
visibility:
public

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