N, D, K = map(int, input().split())
A = list(map(int, input().split()))
C = list(map(int, input().split()))
satisfaction = [[-float('inf') for j in range(K + 1)] for i in range(D + 1)]
satisfaction[0][0] = 0
for i in range(N):
    for j in range(D, 0, -1):
        satisfaction[j][K] = max(satisfaction[j][K], A[i] + max(satisfaction[j-1][max(K-C[i],0):]))
        for k in range(K - 1, C[i] - 1, -1):
            satisfaction[j][k] = max(satisfaction[j][k], A[i] + satisfaction[j-1][k-C[i]])

if satisfaction[D][K] > -float('inf'):
    print(satisfaction[D][K])
else:
    print("No")