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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int a,b,c,d,e,i,l,m,n;
  6. 	cin >> i;
  7. 	while (i--)
  8. 	{
  9. 		cin >> a >> b;
  10. 		if (a%2 == 0)
  11. 		{
  12. 			int ans = a/(b-1);
  13. 			if (a%(b-1) >= 1)
  14. 			{
  15. 				ans++;
  16. 			}
  17. 			cout << ans << '\n';
  18. 		}
  19. 		else
  20. 		{
  21. 			int ans = 1 + (a-b)/(b-1);
  22. 			if ((a-b)%(b-1) >= 1)
  23. 			{
  24. 				ans++;
  25. 			}
  26. 			cout << ans << '\n';
  27. 		}
  28. 	}
  29. }
Success #stdin #stdout 0.01s 5264KB
comments (?)
stdin
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8
39 7
9 3
6 3
999967802 3
5 5
6 5
999999999 3
1000000000 3
stdout
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7
4
3
499983901
1
2
499999999
500000000
https://ideone.com/lONZot
language:
C++14 (gcc 8.3)
created:
40 days ago
visibility:
public

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