Help for this page
for(<>){$a=a;$a++while/$a/i;f lt$a&&push@{$_[y///c]},$_}@_=map$_?@$_:( +),@_;print$_[0]
for(<>){$a=a;$a++while/$a/i;f lt$a&&push@{$_[y///c]},$_}print+(map$_?@ +$_:(),@_)[0]