Nothing
rectangle <-
function(data){
n=length(data)
s=sum(data)
t=min(data)*n
if(s-t<0){print(paste(s,t,n,s-t))}
#s=s-(data[1]+data[n])*n/2
# print(c(min(data),max(data),s,t))
return(s-t)
}
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