N, M, K = gets.split.map(&:to_i)
A = N.times.map { gets.split.map(&:to_i) }

dp = Array.new(N + 2) { Array.new(K + 1, false) }
dp[0][0] = true

N.times do |i|
  0.upto(K) do |k|
    next if !dp[i][k]

    A[i].each do |m|
      nk = k + m
      next if K < nk

      dp[i + 1][nk] = true
    end
  end
end

ans = Float::INFINITY

0.upto(K) do |k|
  next if !dp[N][k]

  ans = [ans, K - k].min
end

if ans == Float::INFINITY
  puts -1
else
  puts ans
end