#934. From base 2 to base 10
You get a number written in base 2. Convert it to base 10 and print it.
### Input
One line.
### Output
One line.
Examples
Input
111101011010
Output
3930
Input
1001101100
Output
620
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.