import sys
input = lambda: sys.stdin.readline().rstrip()

def main():
    # 入力
    N, D, K = map(int, input().split())
    A = list(map(int, input().split()))
    C = list(map(int, input().split()))
    # N, D, K = 500, 500, 500
    # A = [1]*500
    # C = [1]*500
    # 計算・出力
    dp = [[-10**15]*(K+1) for _ in range(D+1)]
    dp[0][0] = 0
    for n, c in enumerate(C):
        a = A[n]
        for d in range(min(n, D-1), -1, -1):
            for k in range(K, -1, -1):
                dd, kk = d+1, min(K, k+c)
                dp[dd][kk] = max(dp[dd][kk], dp[d][k] + a)
    ans = dp[-1][-1]
    print(ans if ans > -10**14 else 'No')

if __name__ == "__main__":
    main()