n,d,k=map(int,input().split())
a=list(map(int,input().split()))
c=list(map(int,input().split()))
dp=[[-10**15 for _ in range(k+1)]for _ in range(d+1)]
dp[0][0]=0 
for i in range(n):
    new=[]
    for j in dp:
        new.append(j[:])
    for j in range(min(d,i+1)):
        for l in range(k+1):
            new[j+1][min(k,l+c[i])]=max(dp[j][l]+a[i],new[j+1][min(k,l+c[i])])
    dp=[]
    for j in new:
        dp.append(j[:])
if dp[-1][-1]<-10**14:
	print('No')
else:
	print(dp[-1][-1])