function count_overclaims(claims)
    fabric = zeros(1000, 1000)
    for claim in claims
        claimed_area = view(
            fabric,
            claim[:x]+1:claim[:x]+claim[:width],
            claim[:y]+1:claim[:y]+claim[:height],
        )
        claimed_area .+= 1
    end
    return count(x -> x>1, fabric)
end

function parse_claim(s)
    id, s = split(s, '@')
    corner, dimensions = split(s, ':')
    x, y = map(x->parse(Int,x), split(corner, ','))
    width, height = map(x->parse(Int,x), split(dimensions, 'x'))
    return (x=x, y=y, width=width, height=height)
end

println(count_overclaims(map(parse_claim, readlines(stdin))))