Chris is teaching a part$-$time course at a college. There are $4$ assignments in the course. The overall assignment score is calculated according to the following rule:

$$ Assignment $1$ is worth $50\%$

$$ Assignment $2$ is worth $30\%$

$$ The remaining $20\%$ is from the best of Assignment $3$ and $4$

Write a complete program for Chris that should read in $4$ assignment scores $($possibly with fractions and the maximum is $100$ marks$),$ and should then calculate and print the overall assignment score.

Please use Python to solve.