N, D, K = map(int, input().split())
A = list(map(int, input().split()))
C = list(map(lambda x: min(int(x), 500), input().split()))

INF = 1 << 60
dp = [[-INF] * (K + 1) for _ in range(D + 1)]
dp[0][0] = 0
for a, c in zip(A, C):
    for d in range(D, 0, -1):
        cum_max = [-INF] * (K + 1)
        for k in range(K + 1):
            cum_max[k] = dp[d - 1][k]
        for k in range(K, 0, -1):
            cum_max[k - 1] = max(cum_max[k - 1], cum_max[k])
        for k in range(K, 0, -1):
            dp[d][k] = max(dp[d][k], cum_max[max(0, k - c)] + a)

ans = dp[D][K]
if ans < -10**9:
    print("No")
else:
    print(ans)