2N + 1

Time Limit: 1 sec

 

The Problem

Little Shan is learning Math. He write a function like that

 

F(N) = 2N + 1

 

Given N, you need to calculate the value of F(N).

 

The Input

The input file contains only one integer number N (0<N<=100).

 

The Output

For input N you need to print the value of F(N) in a separate line.

 

Sample Input

2

 

Sample Output

5

 

 

 

[School Level]

ISCPC 2017 Preliminary

Problem Setter: Shahin ShamS