Write a program that converts a number from binary to hexadecimal
Input
The program receives as input a string consisting of zeros and ones, the length of which does not exceed 4000 characters. The first character of a string is always one. This string is a binary representation of some number.
Imprint
It is necessary to write in hexadecimal form and output this number using the numbers 0, ..., 9 and the letters A, ..., F without leading zeros.
Examples
| # |
Input |
Output |
| 1 |
10100 |
14 |