N, D, K = map(int, input().split())
A = list(map(int, input().split()))
C = list(map(int, input().split()))

inf = 10 ** 18
pre = [[-inf] * (K + 1) for _ in range(D + 1)]
pre[0][0] = 0
for a, c in zip(A, C):
    dp = [[-inf] * (K + 1) for _ in range(D + 1)]
    for d in range(D + 1):
        for k in range(K + 1):
            if pre[d][k] == -inf:
                continue
            dp[d][k] = max(dp[d][k], pre[d][k])
            if d != D:
                nd = d + 1
                nk = min(K, k + c)
                dp[nd][nk] = max(dp[nd][nk], pre[d][k] + a)
    dp, pre = pre, dp
    
if pre[D][K] >= -inf//2:
    print(pre[D][K])
else:
    print("No")