USERS_FILE=$1
OWNER_ID=$2
TASKS=$3

mkdir documents tasks solutions
useradd $OWNER_ID

setfacl -m o::- g:students:rx u:$OWNER_ID'':rx documents
setfacl -md o::- g:students:r u:$OWNER_ID'':rw documents

setfacl -m o::- g:students:rx u:$OWNER_ID'':rx tasks
setfacl -md o::- g:students:r u:$OWNER_ID'':rwx tasks

setfacl -m o::- g:students:rx u:$OWNER_ID'':rx solutions
setfacl -md o::- u:$OWNER_ID'':rwx solutions

while user_id name surname
do
  useradd $user_id --groups students

  cd solutions
  for ((i=1; i<=$TASKS; i++))
  do
    mkdir $user_id'-'$i
    setfacl -m o::- u:$user_id'':rwx
  done
  cd..
done < "$USERS_FILE"