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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7. 	cin.tie(NULL);
  8. 	ios_base::sync_with_stdio(false);
  9. 	int n, k, *val, *total;
  10. 	cin >> n >> k;
  11. 	total = new int[k];
  12. 	for (int i = 0; i < k; i++)
  13. 		total[i] = 0;
  14. 	val = new int[n];
  15. 	for (int i = 0; i < n; i++)
  16. 	{
  17. 		cin >> val[i];
  18. 		total[val[i] - 1] = 1;
  19. 	}
  20. 	for (int i = 0; i < k; i++)
  21. 	{
  22. 		if (!total[i])
  23. 		{
  24. 			int min = 1000000;
  25. 			for (int j = 0; j < n; j++)
  26. 			{
  27. 				if (val[j] <= i && total[i - val[j]] < min)
  28. 					min = total[i - val[j]];
  29. 				if (min == 1)
  30. 					break;
  31. 			}
  32. 			total[i] = min + 1;
  33. 		}
  34. 	}
  35. 	if (total[k - 1] > 1000000)
  36. 		cout << -1;
  37. 	else
  38. 		cout << total[k - 1];
  39. }
Success #stdin #stdout 0s 15232KB
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stdin
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https://ideone.com/ZHLqNF
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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