Doubling Your Money
A deposit earns R% simple interest per year (interest on the principal only). Print the first whole year at which the balance is at least double the principal.
Input: one integer R.
Output: the smallest y with 100 + R·y ≥ 200, i.e. ⌈100/R⌉.
Constraints:
- 1 ≤ R ≤ 100
Sample Tests
Input 1
7
Output 1
15
Input 2
100
Output 2
1
Discussion (opens after you solve — no spoilers before)
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