01110001, That Is the Question
Execution time limit is 1 second
Runtime memory usage limit is 122.174 megabytes
As you know, the number in binary is written using the digits 0 and 1. You must convert number from binary to decimal.
Input
One nonnegative integer in binary notation. Contains no more than 15 digits. The notation can start from zeros.
Output
Print the number in decimal notation.
Examples
Input #1
Answer #1
Input #2
Answer #2
Input #3
Answer #3
Input #4
Answer #4
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