bash-pure, 183 bytes

Result

WA

Code [DL]

a=()
while read -n 1 c;do a+=($c);done
for((i=0;i<100;i++));do for((j=0;j<99;j++));do if [[ a[$i] < a[$j] ]];then t=a[$i];a[$i]=a[$j];a[$j]=$t;fi;done;done
echo $(IFS=;echo "${p[*]}")

stdin

5137547971833272968051064299936872849313686833508136985891778807128320568110106538562634508863941044

stdout

stderr

/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)

strace