How do I stop this error?

scoreln $=$int$($input$())$

ValueError: invalid literal for int$()$with base $10$: $\text{'}99\mathrm{.}1\text{'}$

I want to be able to add decimal inputs

scores $=[0]*100$

scoresGTEListing $=""$

scoresLTListing $=""$

sum $=0$

i $=0$

scoreln $=0$

print$("$Enter a score or negative number to exit: $")$

scoreln $=$int$($input$())$

while scoreln $>=0$:

$$ scores$[$i$]=$scoreln

$$ sum $=$sum $+$scoreln

$$ i $=$i $+1$

$$ print$("$Enter a score or negative number to exit: $")$

$$ scoreln $=$int$($input$())$

print$()$

average $=$sum $/$i

scoresGTECtr $=0$

scoresLTCtr $=0$

print$("$Total scores entered: $"+$str$($i$))$

for index in range$($i$-1,-1,-1)$:

$$ if scores$[$index$]>=$average:

$$ scoresGTECtr $=$scoresGTECtr $+1$

$$ scoresGTEListing $=$scoresGTEListing $+$str$($scores$[$index$])+""$

$$ else:

$$ scoresLTCtr $=$scoresLTCtr $+1$

$$ scoresLTListing $=$scoresLTListing $+$str$($scores$[$index$])+""$

print$("$Average score: $"+$str$($average$))$

print$("$Number of scores greater than or equal to the average: $"+$str$($scoresGTECtr$))$

print$("$The scores greater than or equal to the average are: $"+$scoresGTEListing$)$

print$()$

print$("$Number of scores less than the average: $"+$str$($scoresLTCtr$))$

print$("$The scores less than the average are: $"+$scoresLTListing$)$