n, d, k = map(int, input().split())
inf = float("INF")
A = list(map(int, input().split()))
B = list(map(int, input().split()))
dp = [[-inf for _ in range(k+1)] for _ in range(d+1)]
dp[0][0] = 0
for i in range(n):
    a, b = A[i], B[i]
    for j in range(d-1, -1, -1):
        for t in range(k, -1, -1):
            nj = j+1
            nt = min(k, t + b)
            dp[nj][nt] = max(dp[nj][nt], dp[j][t] + a)

print(dp[-1][-1] if dp[-1][-1] != -inf else "No")