n, d, b = read_line.split.map(&.to_i)
a = read_line.split.map(&.to_i)
c = read_line.split.map(&.to_i)

dp = Array.new(b + 1) { Array.new(d + 1, -1e18.to_i64) }
dp[0][0] = 0
n.times do |i|
  b.downto(0) do |j|
    nj = {j + c[i], b}.min
    (d - 1).downto(0) do |k|
      dp[nj][k + 1] = {dp[nj][k + 1], dp[j][k] + a[i]}.max
    end
  end
end
ans = dp[b][d]
puts ans < -1e17 ? "No" : ans