import sys

def main():
    input = sys.stdin.read
    data = input().split()

    n, d, k = map(int, data[:3])
    a = list(map(int, data[3:3 + n]))
    c = list(map(int, data[3 + n:]))

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

    for i in range(n):
        for j in range(d - 1, -1, -1):
            for l in range(k, -1, -1):
                if dp[j][l] != -inf:
                    next_cost = min(k, l + c[i])
                    dp[j + 1][next_cost] = max(dp[j + 1][next_cost], dp[j][l] + a[i])

    ans = dp[d][k]
    if ans == -inf:
        print("No")
    else:
        print(ans)

if __name__ == "__main__":
    main()