Octal to Decimal

Time Limit: 1 sec

 

The Problem

The octal numeral system, or oct for short, is the base-8 number system, and uses the digits 0 to 7.

 

Write a simple program which read a 5 digit octal number X and convert the octal number to decimal then print the decimal number. 

 

Example:

if X = 71263

Calculation is very simple

7 X 8⁴ +  1 X 8³ + 2 X 8² + 6 X 8¹ + 3 X 2⁰

= 7 X 4096 + 1 X 512 + 2 X 64 + 6 X 8 + 3 X 1

= 28672 + 512 + 128 + 48 + 3

= 29363

 

 

 

The Input

The input file contains only one 5 digit octal number.

 

The Output

Output will show the one integer number wich is the converted decimal value from the given octal number in a separate line.

 

Sample Input

71263

 

Sample Output

29363

 

 

 

 

Problem Setter: Shahin ShamS