Hiring process8 levels
  1. 1 IQ Test
  2. 2 Additional Online Test (If Required)
  3. 3 Office Interview with Hiring Manager
  4. 4 Unpaid Test Task (Motivation Check)
  5. 5 Paid Test Task and Follow-Up Interview
  6. 6 Iterative Paid Test Tasks
  7. 7 Office Verification
  8. 8 Final Interview with the Founder

Problems > Wrapper Promotion

Wrapper Promotion

Difficulty: 1100 2000 ms 128 MB

math

A bar costs C. You have M money. Every W wrappers can be exchanged for one more bar (which yields a wrapper too). How many bars do you eat in total?

Input: one line with three integers M C W.

Output: the total bars eaten.

Constraints:

  • 1 ≤ C ≤ M ≤ 1018
  • 2 ≤ W ≤ 109

Sample Tests

Input 1
16 2 2
Output 1
15
Input 2
10 10 5
Output 2
1

Read the Editorial Statistics

Discussion (opens after you solve — no spoilers before)

No comments yet.

Submit Your Solution

Log in or create a free account to run and submit code.
Ctrl+Enter submit · Ctrl+Space autocomplete · F11 fullscreen