Given some real number ~N~, multiply it by 2 and then cast it to an integer.

Input Specification

The first and only line will contain ~N~ ~(-1000 \leq N \leq 1000)~. It is guaranteed that this value will not have more than 6 decimal places.

Output Specification

One integer, the value of ~N*2~ cast to an integer.

Sample Input 1

5.284

Sample Output 1

10

Sample Output 2

6.97

Sample Output 2

13

Sample Output 3

9.00

Sample Output 3

18