def readints():
  return list(map(int, input().split()))

def deep_recursion():
  import sys
  import pypyjit  # type: ignore
  sys.setrecursionlimit(550000)
  pypyjit.set_param('max_unroll_recursion=-1')

def main():
  INF = 10**18
  N, D, K = readints()
  A = readints()
  C = readints()
  # dp[i][d][k] = max sum(A) of d problems with k beautifulness
  dp = [[[-INF] * (K+1) for _ in range(D+1)] for _ in range(N+1)]
  dp[0][0][0] = 0
  for i in range(N):
    # pass
    for k in range(K+1):
      for d in range(D+1):
        dp[i+1][d][k] = dp[i][d][k]
    # take
    for k in range(K+1):
      for d in range(D):
        dp[i+1][d+1][min(K, k+C[i])] = max(dp[i+1][d+1][min(K, k+C[i])],
                                           dp[i][d][k] + A[i])
  ans = dp[-1][-1][-1]
  if ans < 0:
    print('No')
  else:
    print(ans)


if __name__ == '__main__':
  # deep_recursion()
  main()