import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################

n, d, k = na()
a = na()
c = na()

inf = float("inf")
dp = [[-inf] * (k + 1) for i in range(d + 1)]
dp[0][0] = 0

for i in range(n):
    # ndp = [[-inf] * (k + 1) for i in range(d + 1)]
    # dp, ndp = ndp, dp
    for j in range(d-1, -1, -1):
        for x in range(k + 1):
            # print(dp, max, min)
            # print(a[i], c[i], dp[j+1])
            dp[j + 1][min(x + c[i], k)] = max(dp[j + 1][min(x + c[i], k)], dp[j][x] + a[i])
    # for i in range(d+1):
    #     print(dp[i])
    # print()
if dp[d][k] == -inf:
    print("No")
else:
    print(dp[d][k])