How do I stop this error?

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

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

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$)$