e-olymp
Problems

Launch

Launch

Launch starts with an initial velocityV (m/s) and moves in straight lines with constant accelerationA (m/s2). Which account meter path will be performed for the first time, less of a givenT (s) ?

Input

Set three real numbersA, V, Tthrough the gap.

Output

Output one integer - the desired value.

Time limit 1 second
Memory limit 64 MiB
Input example
1 0 1
Output example
2
Source II этап Всеукраинской олимпиады школьников 2008-2009, г. Бердичев