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

dp = [[[float("-inf") for _ in range(K+1)] for _ in range(D+1)] for _ in range(N+1)]
dp[0][0][0] = 0

for i in range(N):
    for j in range(D+1):
        for k in range(K+1):
            if(dp[i][j][k] == float("-inf")):continue
            #選ばない
            dp[i+1][j][k] = max(dp[i+1][j][k],dp[i][j][k])

            #選ぶ
            if(j+1 > D):continue
            dp[i+1][j+1][min(k+C[i],K)] = max(dp[i+1][j+1][min(k+C[i],K)],dp[i][j][k] + A[i])
    
print(dp[-1][-1][-1] if dp[-1][-1][-1] != float("-inf") else "No")