Q913: Joana and the Odd Numbers

Joana尺舧闽计笴栏Τぱ秨﹍糶–常琌计
 1
3 5 7
9 11 13 15 17
19 21 23 25 27 29 31
...

琘Joana糶55计计赣程3计㎝盾
倒计N琘ΤN计计ヴ叭琌р赣程计癬ㄓ 

Input

块Τ舱代刚戈

–舱代刚戈Τ计 Nボ琘Τ N 计计1 < N < 1000000000

Output

癸–舱代刚戈块赣程计㎝セ拜肈い玂靡计㎝﹚263

Sample Input Sample Output
3
5
7
15
45
87

Translated by cwebb