Binary to Decimal Conversion

Given a string representing a binary number, convert it to its decimal equivalent.

Recall that a binary number (base-2), denoted as \(b_{n-1}b_{n-2}\ldots b_0\), can be converted to its decimal value \(D\) using the formula:

\(D = \sum_{i=0}^{n-1} b_i \times 2^{n-1-i}\)

Your task is to implement this conversion.

inputFormat

The input consists of a single line containing a binary string \(S\) composed only of characters '0' and '1'.

outputFormat

Output a single line, the decimal (base-10) integer corresponding to the binary string provided.

1011

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