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  1. #include <iostream>
  2. #include <stack>
  3. #include <set>
  4. #include <vector>
  5. #include <list>
  6. using namespace std;
  7.  
  8. double dm(int k)
  9. {
  10. 	double ans = 1;
  11. 	for (int i = 1; i <= k + 1; i++)
  12. 	{
  13. 		ans = ans * i;
  14. 	}
  15. 	return ans;
  16. }
  17. double ds(int k, int n)
  18. {
  19. 	double ans = 1;
  20. 	for (int i = 0; i <= k; i++)
  21. 	{
  22. 		ans = ans * (n + i);
  23. 	}
  24. 	return ans;
  25. }
  26.  
  27.  
  28. int main()
  29. {
  30. 	cin.tie(NULL);
  31. 	cout.tie(NULL);
  32. 	ios::sync_with_stdio(false);
  33. 	int t;
  34. 	cin >> t;
  35. 	int k, n;
  36. 	double ss,mm;
  37. 	for (int i = 0; i < t; i++)
  38. 	{
  39. 		cin >> k;
  40. 		cin >> n;
  41. 		ss = ds(k, n);
  42. 		mm = dm(k);
  43. 		cout << ss / mm<<'\n';
  44. 	}
  45. }
Success #stdin #stdout 0s 15232KB
comments (?)
stdin
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stdout
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1
16
136
816
3876
15504
54264
170544
490314
1.3075e+06
3.26876e+06
7.72616e+06
1.73839e+07
3.74422e+07
https://ideone.com/VX1ISJ
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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