while read times event; do
begin="$(expr 60 \* $(echo $times|sed -e 's/-.*//' -e 's/:/ + /g'))"
end="$(expr 60 \* $(echo $times|sed -e 's/.*-//' -e 's/:/ + /g'))"
max_end="$end"
while read times event; do
begin="$(expr 60 \* $(echo $times|sed -e 's/-.*//' -e 's/:/ + /g'))"
end="$(expr 60 \* $(echo $times|sed -e 's/.*-//' -e 's/:/ + /g'))"
max_end="$end"