You are given a sequence $A=(A_0,A_1,\dots,A_{63})$ of length $64$ consisting of $0$ and $1$. Find $A_0 2^0 + A_1 2^1 + \dots + A_{63} 2^{63}$.

The input is given from Standard Input in the following format: >$A_0$ $A_1$ $\dots$ $A_{63}$ #### Constraints - $A_i$ is $0$ or $1$.

Print the answer as an integer.

***For Sample #1:*** $A_0 2^0 + A_1 2^1 + \dots + A_{63} 2^{63} = 2^0 + 2^2 + 2^3 = 13$.

AtCoder [ABC306B]