highway$\_$number $=$ int$($input$())$

# Check if the highway number is valid

if $1<=$ highway$\_$number $<=99$:

# Primary highway

direction $=$ "north$/$south$"$ if highway$\_$number $\%2!=0$ else "east$/$west$"$

print$($f$"$I$-\{$highway$\_$number$\}$ is primary, going $\{$direction$\}.")$

elif $100<=$ highway$\_$number $<=999$:

# Auxiliary highway

primary$\_$highway $=$ highway$\_$number $\%100$

direction $=$ "north$/$south$"$ if primary$\_$highway $\%2!=0$ else "east$/$west$"$

print$($f$"$I$-\{$highway$\_$number$\}$ is auxiliary, serving I$-\{$primary$\_$highway$\},$ going $\{$direction$\}.")$

elif highway$\_$number $==100$ or highway$\_$number $\%100==0$:

# Invalid highway number with last two digits as $"00"$

print$($f$"\{$highway$\_$number$\}$ is not a valid interstate highway number."$)$

else:

# Invalid highway number

print$($f$"\{$highway$\_$number$\}$ is not a valid interstate highway number."$)$

I cant get case $4$ to output correctly. $1$:Primary $(90)$

$1/1$

Input

$90$

Your output

I$-90$ is primary, going east$/$west$.$

$2$:Auxiliary $(290)$

$1/1$

Input

$290$

Your output

I$-290$ is auxiliary, serving I$-90,$ going east$/$west$.$

$3$:Invalid $(0)$

$1/1$

Input

$0$

Your output

$0$ is not a valid interstate highway number.

$4$:Compare output

$0/1$

Output differs. See highlights below.

Special character legend

Input

$200$

Your output

I$-200$ is auxiliary, serving I$-0,$ going east$/$west$.$

Expected output

$200$ is not a valid interstate highway number.

$5$:Compare output

$2/2$

Input

$5$

Your output

I$-5$ is primary, going north$/$south$.$

$6$:Compare output

$2/2$

Input

$405$

Your output

I$-405$ is auxiliary, serving I$-5,$ going north$/$south$.$

$7$:Compare output

$2/2$

Input

$1000$

Your output

$1000$ is not a valid interstate highway number.